1213412131251 has 12 divisors (see below), whose sum is σ = 1752732250360. Its totient is φ = 808929495360.

The previous prime is 1213412131237. The next prime is 1213412131297. The reversal of 1213412131251 is 1521312143121.

1213412131251 is a `hidden beast` number, since 1 + 2 + 1 + 341 + 2 + 1 + 312 + 5 + 1 = 666.

It is not a de Polignac number, because 1213412131251 - 2⁷ = 1213412131123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213412131651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325741 + ... + 1591518.

Almost surely, 2^{1213412131251} is an apocalyptic number.

1213412131251 is a deficient number, since it is larger than the sum of its proper divisors (539320119109).

1213412131251 is a wasteful number, since it uses less digits than its factorization.

1213412131251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987586 (or 1987583 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

Adding to 1213412131251 its reverse (1521312143121), we get a palindrome (2734724274372).

The spelling of 1213412131251 in words is "one trillion, two hundred thirteen billion, four hundred twelve million, one hundred thirty-one thousand, two hundred fifty-one".