2120431220 has 24 divisors (see below), whose sum is σ = 4464369000. Its totient is φ = 845988992.

The previous prime is 2120431211. The next prime is 2120431223. The reversal of 2120431220 is 221340212.

It can be written as a sum of positive squares in 4 ways, for example, as 402162916 + 1718268304 = 20054^2 + 41452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120431223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128495 + ... + 144054.

It is an arithmetic number, because the mean of its divisors is an integer number (186015375).

Almost surely, 2^2120431220 is an apocalyptic number.

2120431220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120431220 is an abundant number, since it is smaller than the sum of its proper divisors (2343937780).

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

2120431220 is a wasteful number, since it uses less digits than its factorization.

2120431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272947 (or 272945 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2120431220 is about 46048.1402447482. The cubic root of 2120431220 is about 1284.7187522578.

Adding to 2120431220 its reverse (221340212), we get a palindrome (2341771432).

The spelling of 2120431220 in words is "two billion, one hundred twenty million, four hundred thirty-one thousand, two hundred twenty".