12311213100 has 72 divisors (see below), whose sum is σ = 35635719168. Its totient is φ = 3281582400.

The previous prime is 12311213069. The next prime is 12311213137. The reversal of 12311213100 is 131211321.

It is a happy number.

It is a super-2 number, since 2×12311213100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12311213100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 822685 + ... + 837515.

It is an arithmetic number, because the mean of its divisors is an integer number (494940544).

Almost surely, 2^12311213100 is an apocalyptic number.

12311213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311213100 is an abundant number, since it is smaller than the sum of its proper divisors (23324506068).

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

12311213100 is a wasteful number, since it uses less digits than its factorization.

12311213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17615 (or 17608 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 12311213100 its reverse (131211321), we get a palindrome (12442424421).

The spelling of 12311213100 in words is "twelve billion, three hundred eleven million, two hundred thirteen thousand, one hundred".