31112412021 has 12 divisors (see below), whose sum is σ = 45165983200. Its totient is φ = 20637377640.

The previous prime is 31112411989. The next prime is 31112412047. The reversal of 31112412021 is 12021421113.

It is not a de Polignac number, because 31112412021 - 2⁵ = 31112411989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31112411985 and 31112412003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112412061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8683975 + ... + 8687556.

Almost surely, 2^31112412021 is an apocalyptic number.

It is an amenable number.

31112412021 is a deficient number, since it is larger than the sum of its proper divisors (14053571179).

31112412021 is a wasteful number, since it uses less digits than its factorization.

31112412021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17371736 (or 17371733 counting only the distinct ones).

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

Adding to 31112412021 its reverse (12021421113), we get a palindrome (43133833134).

The spelling of 31112412021 in words is "thirty-one billion, one hundred twelve million, four hundred twelve thousand, twenty-one".