31251243421199 has 2 divisors, whose sum is σ = 31251243421200. Its totient is φ = 31251243421198.

The previous prime is 31251243421121. The next prime is 31251243421261. The reversal of 31251243421199 is 99112434215213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31251243421199 - 2³⁶ = 31182523944463 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31251243421799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15625621710599 + 15625621710600.

It is an arithmetic number, because the mean of its divisors is an integer number (15625621710600).

Almost surely, 2^{31251243421199} is an apocalyptic number.

31251243421199 is a deficient number, since it is larger than the sum of its proper divisors (1).

31251243421199 is an equidigital number, since it uses as much as digits as its factorization.

31251243421199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The spelling of 31251243421199 in words is "thirty-one trillion, two hundred fifty-one billion, two hundred forty-three million, four hundred twenty-one thousand, one hundred ninety-nine".