121115926431 has 10 divisors (see below), whose sum is σ = 180926260592. Its totient is φ = 80743950900.

The previous prime is 121115926423. The next prime is 121115926441. The reversal of 121115926431 is 134629511121.

121115926431 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 1 + 5 + 9 + 2 + 643 + 1 = 666.

It is not a de Polignac number, because 121115926431 - 2³ = 121115926423 is a prime.

It is a super-2 number, since 2×121115926431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121115926411) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 747629095 + ... + 747629256.

Almost surely, 2^121115926431 is an apocalyptic number.

121115926431 is a deficient number, since it is larger than the sum of its proper divisors (59810334161).

121115926431 is an equidigital number, since it uses as much as digits as its factorization.

121115926431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495258363 (or 1495258354 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The spelling of 121115926431 in words is "one hundred twenty-one billion, one hundred fifteen million, nine hundred twenty-six thousand, four hundred thirty-one".