111434155999 has 2 divisors, whose sum is σ = 111434156000. Its totient is φ = 111434155998.

The previous prime is 111434155991. The next prime is 111434156021. The reversal of 111434155999 is 999551434111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111434155999 - 2³ = 111434155991 is a prime.

It is a super-2 number, since 2×111434155999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111434155991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55717077999 + 55717078000.

It is an arithmetic number, because the mean of its divisors is an integer number (55717078000).

Almost surely, 2^111434155999 is an apocalyptic number.

111434155999 is a deficient number, since it is larger than the sum of its proper divisors (1).

111434155999 is an equidigital number, since it uses as much as digits as its factorization.

111434155999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 52.

The spelling of 111434155999 in words is "one hundred eleven billion, four hundred thirty-four million, one hundred fifty-five thousand, nine hundred ninety-nine".