321310031022020 has 12 divisors (see below), whose sum is σ = 674751065146284. Its totient is φ = 128524012408800.

The previous prime is 321310031022011. The next prime is 321310031022037. The reversal of 321310031022020 is 20220130013123.

It can be written as a sum of positive squares in 2 ways, for example, as 165229634972224 + 156080396049796 = 12854168^2 + 12493214^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 16065501551101 = 321310031022020 / (3 + 2 + 1 + 3 + 1 + 0 + 0 + 3 + 1 + 0 + 2 + 2 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 321310031021983 and 321310031022001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8032750775531 + ... + 8032750775570.

It is an arithmetic number, because the mean of its divisors is an integer number (56229255428857).

Almost surely, 2^{321310031022020} is an apocalyptic number.

It is an amenable number.

321310031022020 is an abundant number, since it is smaller than the sum of its proper divisors (353441034124264).

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

321310031022020 is a wasteful number, since it uses less digits than its factorization.

321310031022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16065501551110 (or 16065501551108 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 321310031022020 its reverse (20220130013123), we get a palindrome (341530161035143).

The spelling of 321310031022020 in words is "three hundred twenty-one trillion, three hundred ten billion, thirty-one million, twenty-two thousand, twenty".