31020210139 has 2 divisors, whose sum is σ = 31020210140. Its totient is φ = 31020210138.

The previous prime is 31020210083. The next prime is 31020210149. The reversal of 31020210139 is 93101202013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31020210139 - 2³³ = 22430275547 is a prime.

It is not a weakly prime, because it can be changed into another prime (31020210149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510105069 + 15510105070.

It is an arithmetic number, because the mean of its divisors is an integer number (15510105070).

Almost surely, 2^31020210139 is an apocalyptic number.

31020210139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020210139 is an equidigital number, since it uses as much as digits as its factorization.

31020210139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 31020210139 in words is "thirty-one billion, twenty million, two hundred ten thousand, one hundred thirty-nine".