2102002139 has 2 divisors, whose sum is σ = 2102002140. Its totient is φ = 2102002138.

The previous prime is 2102002109. The next prime is 2102002159. The reversal of 2102002139 is 9312002012.

It is an a-pointer prime, because the next prime (2102002159) can be obtained adding 2102002139 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2102002139 - 2⁸ = 2102001883 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102002139.

It is not a weakly prime, because it can be changed into another prime (2102002109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051001069 + 1051001070.

It is an arithmetic number, because the mean of its divisors is an integer number (1051001070).

Almost surely, 2^2102002139 is an apocalyptic number.

2102002139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102002139 is an equidigital number, since it uses as much as digits as its factorization.

2102002139 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 20.

The square root of 2102002139 is about 45847.5968726824. The cubic root of 2102002139 is about 1280.9860035770.

The spelling of 2102002139 in words is "two billion, one hundred two million, two thousand, one hundred thirty-nine".