12131559442 has 16 divisors (see below), whose sum is σ = 18653133312. Its totient is φ = 5914801440.

The previous prime is 12131559373. The next prime is 12131559443. The reversal of 12131559442 is 24495513121.

It is not an unprimeable number, because it can be changed into a prime (12131559443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212643 + ... + 263590.

It is an arithmetic number, because the mean of its divisors is an integer number (1165820832).

Almost surely, 2^12131559442 is an apocalyptic number.

12131559442 is a deficient number, since it is larger than the sum of its proper divisors (6521573870).

12131559442 is a wasteful number, since it uses less digits than its factorization.

12131559442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476553.

The product of its digits is 43200, while the sum is 37.

The spelling of 12131559442 in words is "twelve billion, one hundred thirty-one million, five hundred fifty-nine thousand, four hundred forty-two".