12131403155 has 4 divisors (see below), whose sum is σ = 14557683792. Its totient is φ = 9705122520.

The previous prime is 12131403113. The next prime is 12131403209. The reversal of 12131403155 is 55130413121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12131403155 - 2¹⁶ = 12131337619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213140311 + ... + 1213140320.

It is an arithmetic number, because the mean of its divisors is an integer number (3639420948).

Almost surely, 2^12131403155 is an apocalyptic number.

12131403155 is a deficient number, since it is larger than the sum of its proper divisors (2426280637).

12131403155 is an equidigital number, since it uses as much as digits as its factorization.

12131403155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426280636.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 12131403155 its reverse (55130413121), we get a palindrome (67261816276).

The spelling of 12131403155 in words is "twelve billion, one hundred thirty-one million, four hundred three thousand, one hundred fifty-five".