202012152312121 has 2 divisors, whose sum is σ = 202012152312122. Its totient is φ = 202012152312120.

The previous prime is 202012152312119. The next prime is 202012152312133. The reversal of 202012152312121 is 121213251210202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124483000268025 + 77529152044096 = 11157195^2 + 8805064^2 .

It is a cyclic number.

It is not a de Polignac number, because 202012152312121 - 2¹ = 202012152312119 is a prime.

Together with 202012152312119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (202012152313121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101006076156060 + 101006076156061.

It is an arithmetic number, because the mean of its divisors is an integer number (101006076156061).

Almost surely, 2^{202012152312121} is an apocalyptic number.

It is an amenable number.

202012152312121 is a deficient number, since it is larger than the sum of its proper divisors (1).

202012152312121 is an equidigital number, since it uses as much as digits as its factorization.

202012152312121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 25.

The spelling of 202012152312121 in words is "two hundred two trillion, twelve billion, one hundred fifty-two million, three hundred twelve thousand, one hundred twenty-one".