31212313120320 has 112 divisors (see below), whose sum is σ = 99346225292928. Its totient is φ = 8302527078400.

The previous prime is 31212313120267. The next prime is 31212313120333. The reversal of 31212313120320 is 2302131321213.

It is a super-3 number, since 3×31212313120320³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40154724 + ... + 40924643.

Almost surely, 2^{31212313120320} is an apocalyptic number.

31212313120320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31212313120320 is an abundant number, since it is smaller than the sum of its proper divisors (68133912172608).

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

31212313120320 is a wasteful number, since it uses less digits than its factorization.

31212313120320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81079788 (or 81079778 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31212313120320 its reverse (2302131321213), we get a palindrome (33514444441533).

The spelling of 31212313120320 in words is "thirty-one trillion, two hundred twelve billion, three hundred thirteen million, one hundred twenty thousand, three hundred twenty".