2021002020139 has 2 divisors, whose sum is σ = 2021002020140. Its totient is φ = 2021002020138.

The previous prime is 2021002020137. The next prime is 2021002020179. The reversal of 2021002020139 is 9310202001202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021002020139 - 2¹ = 2021002020137 is a prime.

Together with 2021002020137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2021002020137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010501010069 + 1010501010070.

It is an arithmetic number, because the mean of its divisors is an integer number (1010501010070).

Almost surely, 2^{2021002020139} is an apocalyptic number.

2021002020139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021002020139 is an equidigital number, since it uses as much as digits as its factorization.

2021002020139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 2021002020139 in words is "two trillion, twenty-one billion, two million, twenty thousand, one hundred thirty-nine".