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13121210411320 = 2351129820932753
BaseRepresentation
bin1011111011110000010100…
…0101011110100100111000
31201110101010201021101221211
42332330011011132210320
53204434214331130240
643523444552212504
72522655553163644
oct276740505364470
951411121241854
1013121210411320
1141a9746231850
12157ab8a99a134
1374242b870aab
143350da00bc24
1517b4a5a32bea
hexbef0515e938

13121210411320 has 32 divisors (see below), whose sum is σ = 32206607374320. Its totient is φ = 4771349240320.

The previous prime is 13121210411317. The next prime is 13121210411357. The reversal of 13121210411320 is 2311401212131.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 13121210411291 and 13121210411300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14910465937 + ... + 14910466816.

Almost surely, 213121210411320 is an apocalyptic number.

13121210411320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121210411320 is an abundant number, since it is smaller than the sum of its proper divisors (19085396963000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121210411320 is a wasteful number, since it uses less digits than its factorization.

13121210411320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29820932775 (or 29820932771 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 13121210411320 its reverse (2311401212131), we get a palindrome (15432611623451).

The spelling of 13121210411320 in words is "thirteen trillion, one hundred twenty-one billion, two hundred ten million, four hundred eleven thousand, three hundred twenty".

Divisors: 1 2 4 5 8 10 11 20 22 40 44 55 88 110 220 440 29820932753 59641865506 119283731012 149104663765 238567462024 298209327530 328030260283 596418655060 656060520566 1192837310120 1312121041132 1640151301415 2624242082264 3280302602830 6560605205660 13121210411320