12015425231 has 4 divisors (see below), whose sum is σ = 12125658600. Its totient is φ = 11905191864.

The previous prime is 12015425137. The next prime is 12015425237. The reversal of 12015425231 is 13252451021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13252451021 = 47 ⋅281967043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12015425231 is a prime.

It is a super-2 number, since 2×12015425231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12015425231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12015425237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55116521 + ... + 55116738.

It is an arithmetic number, because the mean of its divisors is an integer number (3031414650).

Almost surely, 2^12015425231 is an apocalyptic number.

12015425231 is a deficient number, since it is larger than the sum of its proper divisors (110233369).

12015425231 is a wasteful number, since it uses less digits than its factorization.

12015425231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110233368.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 12015425231 its reverse (13252451021), we get a palindrome (25267876252).

The spelling of 12015425231 in words is "twelve billion, fifteen million, four hundred twenty-five thousand, two hundred thirty-one".