12131015555 has 8 divisors (see below), whose sum is σ = 14649940752. Its totient is φ = 9642997728.

The previous prime is 12131015531. The next prime is 12131015587. The reversal of 12131015555 is 55551013121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12131015555 - 2¹⁴ = 12130999171 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7725977 + ... + 7727546.

It is an arithmetic number, because the mean of its divisors is an integer number (1831242594).

Almost surely, 2^12131015555 is an apocalyptic number.

12131015555 is a deficient number, since it is larger than the sum of its proper divisors (2518925197).

12131015555 is a wasteful number, since it uses less digits than its factorization.

12131015555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15453685.

The product of its (nonzero) digits is 3750, while the sum is 29.

Adding to 12131015555 its reverse (55551013121), we get a palindrome (67682028676).

The spelling of 12131015555 in words is "twelve billion, one hundred thirty-one million, fifteen thousand, five hundred fifty-five".