101221002139 has 2 divisors, whose sum is σ = 101221002140. Its totient is φ = 101221002138.

The previous prime is 101221002073. The next prime is 101221002191. The reversal of 101221002139 is 931200122101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101221002139 - 2²³ = 101212613531 is a prime.

It is not a weakly prime, because it can be changed into another prime (101221003139) 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, 50610501069 + 50610501070.

It is an arithmetic number, because the mean of its divisors is an integer number (50610501070).

Almost surely, 2^101221002139 is an apocalyptic number.

101221002139 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221002139 is an equidigital number, since it uses as much as digits as its factorization.

101221002139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 101221002139 in words is "one hundred one billion, two hundred twenty-one million, two thousand, one hundred thirty-nine".