111431212431 has 48 divisors (see below), whose sum is σ = 188487957504. Its totient is φ = 57313080000.

The previous prime is 111431212427. The next prime is 111431212441. The reversal of 111431212431 is 134212134111.

It is not a de Polignac number, because 111431212431 - 2² = 111431212427 is a prime.

It is a super-2 number, since 2×111431212431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111431212441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39546 + ... + 473736.

It is an arithmetic number, because the mean of its divisors is an integer number (3926832448).

Almost surely, 2^111431212431 is an apocalyptic number.

111431212431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111431212431 is a deficient number, since it is larger than the sum of its proper divisors (77056745073).

111431212431 is a wasteful number, since it uses less digits than its factorization.

111431212431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434324 (or 434313 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

Adding to 111431212431 its reverse (134212134111), we get a palindrome (245643346542).

The spelling of 111431212431 in words is "one hundred eleven billion, four hundred thirty-one million, two hundred twelve thousand, four hundred thirty-one".