31222320312020 has 48 divisors (see below), whose sum is σ = 65743168458240. Its totient is φ = 12455351282304.

The previous prime is 31222320311933. The next prime is 31222320312023. The reversal of 31222320312020 is 2021302322213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222320312023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169449782 + ... + 169633938.

It is an arithmetic number, because the mean of its divisors is an integer number (1369649342880).

Almost surely, 2^{31222320312020} is an apocalyptic number.

It is an amenable number.

31222320312020 is an abundant number, since it is smaller than the sum of its proper divisors (34520848146220).

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

31222320312020 is a wasteful number, since it uses less digits than its factorization.

31222320312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206912 (or 206910 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31222320312020 its reverse (2021302322213), we get a palindrome (33243622634233).

The spelling of 31222320312020 in words is "thirty-one trillion, two hundred twenty-two billion, three hundred twenty million, three hundred twelve thousand, twenty".