31212130102320 has 80 divisors (see below), whose sum is σ = 96762566344032. Its totient is φ = 8322807767040.

The previous prime is 31212130102301. The next prime is 31212130102369. The reversal of 31212130102320 is 2320103121213.

It is a tau number, because it is divible by the number of its divisors (80).

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, 1367130 + ... + 8018310.

Almost surely, 2^{31212130102320} is an apocalyptic number.

31212130102320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31212130102320 is an abundant number, since it is smaller than the sum of its proper divisors (65550436241712).

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

31212130102320 is a wasteful number, since it uses less digits than its factorization.

31212130102320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670750 (or 6670744 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31212130102320 its reverse (2320103121213), we get a palindrome (33532233223533).

The spelling of 31212130102320 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirty million, one hundred two thousand, three hundred twenty".