2321131220 has 12 divisors (see below), whose sum is σ = 4874375604. Its totient is φ = 928452480.

The previous prime is 2321131217. The next prime is 2321131259. The reversal of 2321131220 is 221311232.

It can be written as a sum of positive squares in 2 ways, for example, as 295771204 + 2025360016 = 17198^2 + 45004^2 .

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, 58028261 + ... + 58028300.

It is an arithmetic number, because the mean of its divisors is an integer number (406197967).

Almost surely, 2^2321131220 is an apocalyptic number.

2321131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2321131220 is an abundant number, since it is smaller than the sum of its proper divisors (2553244384).

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

2321131220 is a wasteful number, since it uses less digits than its factorization.

2321131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116056570 (or 116056568 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2321131220 is about 48178.1197225463. The cubic root of 2321131220 is about 1324.0363174322.

Adding to 2321131220 its reverse (221311232), we get a palindrome (2542442452).

The spelling of 2321131220 in words is "two billion, three hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty".