111215044431 has 24 divisors (see below), whose sum is σ = 161160090000. Its totient is φ = 73905374592.

The previous prime is 111215044411. The next prime is 111215044433. The reversal of 111215044431 is 134440512111.

It is a happy number.

111215044431 is a `hidden beast` number, since 1 + 1 + 1 + 215 + 0 + 4 + 443 + 1 = 666.

It is not a de Polignac number, because 111215044431 - 2¹¹ = 111215042383 is a prime.

It is a super-2 number, since 2×111215044431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111215044395 and 111215044404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111215044433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6639675 + ... + 6656403.

It is an arithmetic number, because the mean of its divisors is an integer number (6715003750).

Almost surely, 2^111215044431 is an apocalyptic number.

111215044431 is a deficient number, since it is larger than the sum of its proper divisors (49945045569).

111215044431 is a wasteful number, since it uses less digits than its factorization.

111215044431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19063 (or 19060 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 111215044431 its reverse (134440512111), we get a palindrome (245655556542).

The spelling of 111215044431 in words is "one hundred eleven billion, two hundred fifteen million, forty-four thousand, four hundred thirty-one".