321103131020 has 48 divisors (see below), whose sum is σ = 770684120640. Its totient is φ = 110087272704.

The previous prime is 321103130993. The next prime is 321103131059. The reversal of 321103131020 is 20131301123.

It is a self number, because there is not a number n which added to its sum of digits gives 321103131020.

It is an unprimeable number.

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, 3952166 + ... + 4032594.

It is an arithmetic number, because the mean of its divisors is an integer number (16055919180).

Almost surely, 2^321103131020 is an apocalyptic number.

It is an amenable number.

321103131020 is an abundant number, since it is smaller than the sum of its proper divisors (449580989620).

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

321103131020 is a wasteful number, since it uses less digits than its factorization.

321103131020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108962 (or 108960 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 321103131020 its reverse (20131301123), we get a palindrome (341234432143).

The spelling of 321103131020 in words is "three hundred twenty-one billion, one hundred three million, one hundred thirty-one thousand, twenty".