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1211020112 = 2475688757
BaseRepresentation
bin100100000101110…
…1011001101010000
310010101202012021202
41020023223031100
54440010120422
6320100210332
742003333611
oct11013531520
93111665252
101211020112
11571653375
122996999a8
13163b82463
14b6b9bc08
15714b5b92
hex482eb350

1211020112 has 10 divisors (see below), whose sum is σ = 2346351498. Its totient is φ = 605510048.

The previous prime is 1211020103. The next prime is 1211020117. The reversal of 1211020112 is 2110201121.

It can be written as a sum of positive squares in only one way, i.e., 1121982016 + 89038096 = 33496^2 + 9436^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1211020093 and 1211020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211020117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37844363 + ... + 37844394.

Almost surely, 21211020112 is an apocalyptic number.

It is an amenable number.

1211020112 is a deficient number, since it is larger than the sum of its proper divisors (1135331386).

1211020112 is an equidigital number, since it uses as much as digits as its factorization.

1211020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75688765 (or 75688759 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1211020112 is about 34799.7142517004. The cubic root of 1211020112 is about 1065.9016109514.

Adding to 1211020112 its reverse (2110201121), we get a palindrome (3321221233).

The spelling of 1211020112 in words is "one billion, two hundred eleven million, twenty thousand, one hundred twelve".

Divisors: 1 2 4 8 16 75688757 151377514 302755028 605510056 1211020112