321131120 has 20 divisors (see below), whose sum is σ = 746630040. Its totient is φ = 128452416.

The previous prime is 321131117. The next prime is 321131171. The reversal of 321131120 is 21131123.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 321131095 and 321131104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006990 + ... + 2007149.

It is an arithmetic number, because the mean of its divisors is an integer number (37331502).

Almost surely, 2^321131120 is an apocalyptic number.

It is an amenable number.

321131120 is an abundant number, since it is smaller than the sum of its proper divisors (425498920).

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

321131120 is a wasteful number, since it uses less digits than its factorization.

321131120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014152 (or 4014146 counting only the distinct ones).

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

The square root of 321131120 is about 17920.1316959446. The cubic root of 321131120 is about 684.7953426293.

Adding to 321131120 its reverse (21131123), we get a palindrome (342262243).

It can be divided in two parts, 32113 and 1120, that added together give a palindrome (33233).

The spelling of 321131120 in words is "three hundred twenty-one million, one hundred thirty-one thousand, one hundred twenty".