321133121320 has 64 divisors (see below), whose sum is σ = 791770775040. Its totient is φ = 116251987200.

The previous prime is 321133121291. The next prime is 321133121359. The reversal of 321133121320 is 23121331123.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 321133121291 and 321133121300.

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, 1538311 + ... + 1734550.

It is an arithmetic number, because the mean of its divisors is an integer number (12371418360).

Almost surely, 2^321133121320 is an apocalyptic number.

It is an amenable number.

321133121320 is an abundant number, since it is smaller than the sum of its proper divisors (470637653720).

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

321133121320 is a wasteful number, since it uses less digits than its factorization.

321133121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273106 (or 3273102 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 321133121320 its reverse (23121331123), we get a palindrome (344254452443).

The spelling of 321133121320 in words is "three hundred twenty-one billion, one hundred thirty-three million, one hundred twenty-one thousand, three hundred twenty".