12311715212 has 6 divisors (see below), whose sum is σ = 21545501628. Its totient is φ = 6155857604.

The previous prime is 12311715211. The next prime is 12311715233. The reversal of 12311715212 is 21251711321.

It is a happy number.

It is a super-2 number, since 2×12311715212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12311715211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1538964398 + ... + 1538964405.

It is an arithmetic number, because the mean of its divisors is an integer number (3590916938).

Almost surely, 2^12311715212 is an apocalyptic number.

It is an amenable number.

12311715212 is a deficient number, since it is larger than the sum of its proper divisors (9233786416).

12311715212 is a wasteful number, since it uses less digits than its factorization.

12311715212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077928807 (or 3077928805 counting only the distinct ones).

The product of its digits is 840, while the sum is 26.

The spelling of 12311715212 in words is "twelve billion, three hundred eleven million, seven hundred fifteen thousand, two hundred twelve".