12311203220 has 48 divisors (see below), whose sum is σ = 25958786448. Its totient is φ = 4904478720.

The previous prime is 12311203217. The next prime is 12311203253. The reversal of 12311203220 is 2230211321.

It can be written as a sum of positive squares in 8 ways, for example, as 17272336 + 12293930884 = 4156^2 + 110878^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7594010 + ... + 7595630.

It is an arithmetic number, because the mean of its divisors is an integer number (540808051).

Almost surely, 2^12311203220 is an apocalyptic number.

12311203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311203220 is an abundant number, since it is smaller than the sum of its proper divisors (13647583228).

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

12311203220 is a wasteful number, since it uses less digits than its factorization.

12311203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 2938 counting only the distinct ones).

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

Adding to 12311203220 its reverse (2230211321), we get a palindrome (14541414541).

The spelling of 12311203220 in words is "twelve billion, three hundred eleven million, two hundred three thousand, two hundred twenty".