3121323020 has 24 divisors (see below), whose sum is σ = 6665878800. Its totient is φ = 1227367232.

The previous prime is 3121323017. The next prime is 3121323043. The reversal of 3121323020 is 203231213.

It is a self number, because there is not a number n which added to its sum of digits gives 3121323020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321415 + ... + 1323774.

It is an arithmetic number, because the mean of its divisors is an integer number (277744950).

Almost surely, 2^3121323020 is an apocalyptic number.

It is an amenable number.

3121323020 is an abundant number, since it is smaller than the sum of its proper divisors (3544555780).

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

3121323020 is a wasteful number, since it uses less digits than its factorization.

3121323020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645257 (or 2645255 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 3121323020 is about 55868.8018486167. The cubic root of 3121323020 is about 1461.4352278061.

Adding to 3121323020 its reverse (203231213), we get a palindrome (3324554233).

The spelling of 3121323020 in words is "three billion, one hundred twenty-one million, three hundred twenty-three thousand, twenty".