321131001020 has 48 divisors (see below), whose sum is σ = 683802134400. Its totient is φ = 126661017600.

The previous prime is 321131001017. The next prime is 321131001029. The reversal of 321131001020 is 20100131123.

It is a super-2 number, since 2×321131001020² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321131000986 and 321131001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321131001029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1082870 + ... + 1347170.

It is an arithmetic number, because the mean of its divisors is an integer number (14245877800).

Almost surely, 2^321131001020 is an apocalyptic number.

It is an amenable number.

321131001020 is an abundant number, since it is smaller than the sum of its proper divisors (362671133380).

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

321131001020 is a wasteful number, since it uses less digits than its factorization.

321131001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265158 (or 265156 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 321131001020 its reverse (20100131123), we get a palindrome (341231132143).

The spelling of 321131001020 in words is "three hundred twenty-one billion, one hundred thirty-one million, one thousand, twenty".