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11031121321 = 1112743917987
BaseRepresentation
bin10100100011000000…
…11000110110101001
31001110210000000122221
422101200120312221
5140042431340241
65022335114041
7540234661363
oct122140306651
931423000587
1011031121321
1147508647a0
12217a372921
13106a502b2c
14769091d33
1544868a5d1
hex291818da9

11031121321 has 16 divisors (see below), whose sum is σ = 12157009920. Its totient is φ = 9926113680.

The previous prime is 11031121261. The next prime is 11031121337. The reversal of 11031121321 is 12312113011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11031121321 - 27 = 11031121193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11031121295 and 11031121304.

It is not an unprimeable number, because it can be changed into a prime (11031121421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 604290 + ... + 622276.

It is an arithmetic number, because the mean of its divisors is an integer number (759813120).

Almost surely, 211031121321 is an apocalyptic number.

11031121321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11031121321 is a deficient number, since it is larger than the sum of its proper divisors (1125888599).

11031121321 is a wasteful number, since it uses less digits than its factorization.

11031121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18564.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11031121321 its reverse (12312113011), we get a palindrome (23343234332).

The spelling of 11031121321 in words is "eleven billion, thirty-one million, one hundred twenty-one thousand, three hundred twenty-one".

Divisors: 1 11 127 439 1397 4829 17987 55753 197857 613283 2284349 7896293 25127839 86859223 1002829211 11031121321