3121032220 has 12 divisors (see below), whose sum is σ = 6554167704. Its totient is φ = 1248412880.

The previous prime is 3121032179. The next prime is 3121032241. The reversal of 3121032220 is 222301213.

It is a junction number, because it is equal to n+sod(n) for n = 3121032194 and 3121032203.

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, 78025786 + ... + 78025825.

It is an arithmetic number, because the mean of its divisors is an integer number (546180642).

Almost surely, 2^3121032220 is an apocalyptic number.

It is an amenable number.

3121032220 is an abundant number, since it is smaller than the sum of its proper divisors (3433135484).

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

3121032220 is a wasteful number, since it uses less digits than its factorization.

3121032220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156051620 (or 156051618 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3121032220 is about 55866.1992621657. The cubic root of 3121032220 is about 1461.3898412226.

Adding to 3121032220 its reverse (222301213), we get a palindrome (3343333433).

The spelling of 3121032220 in words is "three billion, one hundred twenty-one million, thirty-two thousand, two hundred twenty".