2021100112139 has 2 divisors, whose sum is σ = 2021100112140. Its totient is φ = 2021100112138.

The previous prime is 2021100112081. The next prime is 2021100112169. The reversal of 2021100112139 is 9312110011202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021100112139 - 2⁸ = 2021100111883 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021100112169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010550056069 + 1010550056070.

It is an arithmetic number, because the mean of its divisors is an integer number (1010550056070).

Almost surely, 2^{2021100112139} is an apocalyptic number.

2021100112139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021100112139 is an equidigital number, since it uses as much as digits as its factorization.

2021100112139 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 23.

The spelling of 2021100112139 in words is "two trillion, twenty-one billion, one hundred million, one hundred twelve thousand, one hundred thirty-nine".