321133511020 has 48 divisors (see below), whose sum is σ = 771886640448. Its totient is φ = 109936316160.

The previous prime is 321133510981. The next prime is 321133511029. The reversal of 321133511020 is 20115331123.

It is a super-2 number, since 2×321133511020² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321133510982 and 321133511000.

It is not an unprimeable number, because it can be changed into a prime (321133511029) 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, 1642567 + ... + 1827646.

It is an arithmetic number, because the mean of its divisors is an integer number (16080971676).

Almost surely, 2^321133511020 is an apocalyptic number.

It is an amenable number.

321133511020 is an abundant number, since it is smaller than the sum of its proper divisors (450753129428).

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

321133511020 is a wasteful number, since it uses less digits than its factorization.

321133511020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470890 (or 3470888 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 321133511020 its reverse (20115331123), we get a palindrome (341248842143).

The spelling of 321133511020 in words is "three hundred twenty-one billion, one hundred thirty-three million, five hundred eleven thousand, twenty".