20110021020139 has 2 divisors, whose sum is σ = 20110021020140. Its totient is φ = 20110021020138.

The previous prime is 20110021020077. The next prime is 20110021020179. The reversal of 20110021020139 is 93102012001102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110021020139 is a prime.

It is not a weakly prime, because it can be changed into another prime (20110021020179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055010510069 + 10055010510070.

It is an arithmetic number, because the mean of its divisors is an integer number (10055010510070).

Almost surely, 2^{20110021020139} is an apocalyptic number.

20110021020139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110021020139 is an equidigital number, since it uses as much as digits as its factorization.

20110021020139 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 20110021020139 in words is "twenty trillion, one hundred ten billion, twenty-one million, twenty thousand, one hundred thirty-nine".