131212012113 has 96 divisors (see below), whose sum is σ = 234588856320. Its totient is φ = 68819621760.

The previous prime is 131212012111. The next prime is 131212012123. The reversal of 131212012113 is 311210212131.

It is not a de Polignac number, because 131212012113 - 2¹ = 131212012111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131212012111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 177553098 + ... + 177553836.

It is an arithmetic number, because the mean of its divisors is an integer number (2443633920).

Almost surely, 2^131212012113 is an apocalyptic number.

131212012113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131212012113 is a deficient number, since it is larger than the sum of its proper divisors (103376844207).

131212012113 is a wasteful number, since it uses less digits than its factorization.

131212012113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131212012113 its reverse (311210212131), we get a palindrome (442422224244).

The spelling of 131212012113 in words is "one hundred thirty-one billion, two hundred twelve million, twelve thousand, one hundred thirteen".