1213675386631 has 2 divisors, whose sum is σ = 1213675386632. Its totient is φ = 1213675386630.

The previous prime is 1213675386607. The next prime is 1213675386647. The reversal of 1213675386631 is 1366835763121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213675386631 - 2²³ = 1213666998023 is a prime.

It is a super-2 number, since 2×1213675386631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213675386601) 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 as a sum of consecutive naturals, namely, 606837693315 + 606837693316.

It is an arithmetic number, because the mean of its divisors is an integer number (606837693316).

Almost surely, 2^{1213675386631} is an apocalyptic number.

1213675386631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213675386631 is an equidigital number, since it uses as much as digits as its factorization.

1213675386631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 52.

The spelling of 1213675386631 in words is "one trillion, two hundred thirteen billion, six hundred seventy-five million, three hundred eighty-six thousand, six hundred thirty-one".