202102212139 has 2 divisors, whose sum is σ = 202102212140. Its totient is φ = 202102212138.

The previous prime is 202102212133. The next prime is 202102212163. The reversal of 202102212139 is 931212201202.

202102212139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202102212139 - 2¹⁷ = 202102081067 is a prime.

It is not a weakly prime, because it can be changed into another prime (202102212133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051106069 + 101051106070.

It is an arithmetic number, because the mean of its divisors is an integer number (101051106070).

Almost surely, 2^202102212139 is an apocalyptic number.

202102212139 is a deficient number, since it is larger than the sum of its proper divisors (1).

202102212139 is an equidigital number, since it uses as much as digits as its factorization.

202102212139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 202102212139 in words is "two hundred two billion, one hundred two million, two hundred twelve thousand, one hundred thirty-nine".