120202139 has 2 divisors, whose sum is σ = 120202140. Its totient is φ = 120202138.

The previous prime is 120202127. The next prime is 120202141. The reversal of 120202139 is 931202021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120202139 - 2⁴ = 120202123 is a prime.

Together with 120202141, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120202139.

It is not a weakly prime, because it can be changed into another prime (120202739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60101069 + 60101070.

It is an arithmetic number, because the mean of its divisors is an integer number (60101070).

Almost surely, 2^120202139 is an apocalyptic number.

120202139 is a deficient number, since it is larger than the sum of its proper divisors (1).

120202139 is an equidigital number, since it uses as much as digits as its factorization.

120202139 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 120202139 is about 10963.6736087864. The cubic root of 120202139 is about 493.5192137483.

The spelling of 120202139 in words is "one hundred twenty million, two hundred two thousand, one hundred thirty-nine".