31212102212031 has 32 divisors (see below), whose sum is σ = 44936383242240. Its totient is φ = 19156449527424.

The previous prime is 31212102211931. The next prime is 31212102212033. The reversal of 31212102212031 is 13021220121213.

It is not a de Polignac number, because 31212102212031 - 2¹¹ = 31212102209983 is a prime.

It is a super-2 number, since 2×31212102212031² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31212102211989 and 31212102212007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212102212033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 585907065 + ... + 585960333.

It is an arithmetic number, because the mean of its divisors is an integer number (1404261976320).

Almost surely, 2^{31212102212031} is an apocalyptic number.

31212102212031 is a deficient number, since it is larger than the sum of its proper divisors (13724281030209).

31212102212031 is a wasteful number, since it uses less digits than its factorization.

31212102212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92895.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31212102212031 its reverse (13021220121213), we get a palindrome (44233322333244).

The spelling of 31212102212031 in words is "thirty-one trillion, two hundred twelve billion, one hundred two million, two hundred twelve thousand, thirty-one".