12131223112 has 8 divisors (see below), whose sum is σ = 22746043350. Its totient is φ = 6065611552.

The previous prime is 12131223107. The next prime is 12131223133. The reversal of 12131223112 is 21132213121.

It can be written as a sum of positive squares in only one way, i.e., 12050331076 + 80892036 = 109774^2 + 8994^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12131223112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 758201437 + ... + 758201452.

Almost surely, 2^12131223112 is an apocalyptic number.

It is an amenable number.

12131223112 is a deficient number, since it is larger than the sum of its proper divisors (10614820238).

12131223112 is a wasteful number, since it uses less digits than its factorization.

12131223112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516402895 (or 1516402891 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 12131223112 its reverse (21132213121), we get a palindrome (33263436233).

Subtracting 12131223112 from its reverse (21132213121), we obtain a palindrome (9000990009).

The spelling of 12131223112 in words is "twelve billion, one hundred thirty-one million, two hundred twenty-three thousand, one hundred twelve".