1021102020139 has 2 divisors, whose sum is σ = 1021102020140. Its totient is φ = 1021102020138.

The previous prime is 1021102020097. The next prime is 1021102020151. The reversal of 1021102020139 is 9310202011201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021102020139 - 2¹⁵ = 1021101987371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021102020179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510551010069 + 510551010070.

It is an arithmetic number, because the mean of its divisors is an integer number (510551010070).

Almost surely, 2^{1021102020139} is an apocalyptic number.

1021102020139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021102020139 is an equidigital number, since it uses as much as digits as its factorization.

1021102020139 is an evil number, because the sum of its binary digits is even.

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

The spelling of 1021102020139 in words is "one trillion, twenty-one billion, one hundred two million, twenty thousand, one hundred thirty-nine".