12231756612 has 18 divisors (see below), whose sum is σ = 30919162638. Its totient is φ = 4077252192.

The previous prime is 12231756599. The next prime is 12231756613. The reversal of 12231756612 is 21665713221.

12231756612 is a `hidden beast` number, since 1 + 2 + 2 + 31 + 7 + 5 + 6 + 612 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6530902596 + 5700854016 = 80814^2 + 75504^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 339771017 = 12231756612 / (1 + 2 + 2 + 3 + 1 + 7 + 5 + 6 + 6 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (12231756613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169885473 + ... + 169885544.

Almost surely, 2^12231756612 is an apocalyptic number.

12231756612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12231756612 is an abundant number, since it is smaller than the sum of its proper divisors (18687406026).

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

12231756612 is a wasteful number, since it uses less digits than its factorization.

12231756612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339771027 (or 339771022 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

It can be divided in two parts, 122317 and 56612, that added together give a square (178929 = 423²).

The spelling of 12231756612 in words is "twelve billion, two hundred thirty-one million, seven hundred fifty-six thousand, six hundred twelve".