12311221100 has 18 divisors (see below), whose sum is σ = 26715350004. Its totient is φ = 4924488400.

The previous prime is 12311221093. The next prime is 12311221127. The reversal of 12311221100 is 112211321.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61556006 + ... + 61556205.

Almost surely, 2^12311221100 is an apocalyptic number.

12311221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311221100 is an abundant number, since it is smaller than the sum of its proper divisors (14404128904).

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

12311221100 is a wasteful number, since it uses less digits than its factorization.

12311221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123112225 (or 123112218 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12311221100 its reverse (112211321), we get a palindrome (12423432421).

It can be divided in two parts, 12311221 and 100, that added together give a palindrome (12311321).

The spelling of 12311221100 in words is "twelve billion, three hundred eleven million, two hundred twenty-one thousand, one hundred".