1231951356367 has 2 divisors, whose sum is σ = 1231951356368. Its totient is φ = 1231951356366.

The previous prime is 1231951356347. The next prime is 1231951356371. The reversal of 1231951356367 is 7636531591321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231951356367 - 2¹⁵ = 1231951323599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231951356347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615975678183 + 615975678184.

It is an arithmetic number, because the mean of its divisors is an integer number (615975678184).

Almost surely, 2^{1231951356367} is an apocalyptic number.

1231951356367 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231951356367 is an equidigital number, since it uses as much as digits as its factorization.

1231951356367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3061800, while the sum is 52.

The spelling of 1231951356367 in words is "one trillion, two hundred thirty-one billion, nine hundred fifty-one million, three hundred fifty-six thousand, three hundred sixty-seven".