31311121102212 has 96 divisors (see below), whose sum is σ = 85757019013120. Its totient is φ = 8703839940480.

The previous prime is 31311121102201. The next prime is 31311121102213. The reversal of 31311121102212 is 21220112111313.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31311121102213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69017037 + ... + 69469227.

Almost surely, 2^{31311121102212} is an apocalyptic number.

It is an amenable number.

31311121102212 is an abundant number, since it is smaller than the sum of its proper divisors (54445897910908).

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

31311121102212 is a wasteful number, since it uses less digits than its factorization.

31311121102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474521 (or 474519 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 31311121102212 its reverse (21220112111313), we get a palindrome (52531233213525).

It can be divided in two parts, 3131112 and 1102212, that added together give a palindrome (4233324).

The spelling of 31311121102212 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-one million, one hundred two thousand, two hundred twelve".