321310111020 has 48 divisors (see below), whose sum is σ = 899704508640. Its totient is φ = 85679248896.

The previous prime is 321310111019. The next prime is 321310111049. The reversal of 321310111020 is 20111013123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1626744 + ... + 1813536.

It is an arithmetic number, because the mean of its divisors is an integer number (18743843930).

Almost surely, 2^321310111020 is an apocalyptic number.

321310111020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321310111020 is an abundant number, since it is smaller than the sum of its proper divisors (578394397620).

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

321310111020 is a wasteful number, since it uses less digits than its factorization.

321310111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215474 (or 215472 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 321310111020 its reverse (20111013123), we get a palindrome (341421124143).

The spelling of 321310111020 in words is "three hundred twenty-one billion, three hundred ten million, one hundred eleven thousand, twenty".