31021021133312 has 80 divisors (see below), whose sum is σ = 72750433198080. Its totient is φ = 12935406440448.

The previous prime is 31021021133287. The next prime is 31021021133317. The reversal of 31021021133312 is 21333112012013.

It is not an unprimeable number, because it can be changed into a prime (31021021133317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116832512 + ... + 117097727.

It is an arithmetic number, because the mean of its divisors is an integer number (909380414976).

Almost surely, 2^{31021021133312} is an apocalyptic number.

31021021133312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31021021133312 is an abundant number, since it is smaller than the sum of its proper divisors (41729412064768).

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

31021021133312 is an equidigital number, since it uses as much as digits as its factorization.

31021021133312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233930301 (or 233930285 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31021021133312 its reverse (21333112012013), we get a palindrome (52354133145325).

The spelling of 31021021133312 in words is "thirty-one trillion, twenty-one billion, twenty-one million, one hundred thirty-three thousand, three hundred twelve".