431112021012 has 18 divisors (see below), whose sum is σ = 1089755386538. Its totient is φ = 143704006992.

The previous prime is 431112020987. The next prime is 431112021083. The reversal of 431112021012 is 210120211134.

431112021012 is a `hidden beast` number, since 431 + 1 + 1 + 20 + 210 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 294126167556 + 136985853456 = 542334^2 + 370116^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×431112021012² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5987666923 + ... + 5987666994.

Almost surely, 2^431112021012 is an apocalyptic number.

It is an amenable number.

431112021012 is an abundant number, since it is smaller than the sum of its proper divisors (658643365526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431112021012 is a wasteful number, since it uses less digits than its factorization.

431112021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11975333927 (or 11975333922 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 431112021012 its reverse (210120211134), we get a palindrome (641232232146).

The spelling of 431112021012 in words is "four hundred thirty-one billion, one hundred twelve million, twenty-one thousand, twelve".