31219212940220 has 48 divisors (see below), whose sum is σ = 66331845318816. Its totient is φ = 12341190240000.

The previous prime is 31219212940187. The next prime is 31219212940277. The reversal of 31219212940220 is 2204921291213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13190966 + ... + 15376605.

It is an arithmetic number, because the mean of its divisors is an integer number (1381913444142).

Almost surely, 2^{31219212940220} is an apocalyptic number.

It is an amenable number.

31219212940220 is an abundant number, since it is smaller than the sum of its proper divisors (35112632378596).

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

31219212940220 is a wasteful number, since it uses less digits than its factorization.

31219212940220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28568222 (or 28568220 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 31219212940220 in words is "thirty-one trillion, two hundred nineteen billion, two hundred twelve million, nine hundred forty thousand, two hundred twenty".