2102120002139 has 2 divisors, whose sum is σ = 2102120002140. Its totient is φ = 2102120002138.

The previous prime is 2102120002133. The next prime is 2102120002237. The reversal of 2102120002139 is 9312000212012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2102120002139 - 2²⁰ = 2102118953563 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102120002133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051060001069 + 1051060001070.

It is an arithmetic number, because the mean of its divisors is an integer number (1051060001070).

Almost surely, 2^{2102120002139} is an apocalyptic number.

2102120002139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102120002139 is an equidigital number, since it uses as much as digits as its factorization.

2102120002139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 2102120002139 in words is "two trillion, one hundred two billion, one hundred twenty million, two thousand, one hundred thirty-nine".