12113311220 has 24 divisors (see below), whose sum is σ = 25585001064. Its totient is φ = 4817315456.

The previous prime is 12113311219. The next prime is 12113311271. The reversal of 12113311220 is 2211331121.

It can be written as a sum of positive squares in 4 ways, for example, as 6844583824 + 5268727396 = 82732^2 + 72586^2 .

It is a congruent number.

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, 1747019 + ... + 1753938.

It is an arithmetic number, because the mean of its divisors is an integer number (1066041711).

Almost surely, 2^12113311220 is an apocalyptic number.

12113311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12113311220 is an abundant number, since it is smaller than the sum of its proper divisors (13471689844).

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

12113311220 is a wasteful number, since it uses less digits than its factorization.

12113311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501139 (or 3501137 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12113311220 its reverse (2211331121), we get a palindrome (14324642341).

The spelling of 12113311220 in words is "twelve billion, one hundred thirteen million, three hundred eleven thousand, two hundred twenty".