202101122161 has 2 divisors, whose sum is σ = 202101122162. Its totient is φ = 202101122160.

The previous prime is 202101122141. The next prime is 202101122227. The reversal of 202101122161 is 161221101202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178421760000 + 23679362161 = 422400^2 + 153881^2 .

It is a cyclic number.

It is not a de Polignac number, because 202101122161 - 2¹¹ = 202101120113 is a prime.

It is not a weakly prime, because it can be changed into another prime (202101122141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050561080 + 101050561081.

It is an arithmetic number, because the mean of its divisors is an integer number (101050561081).

Almost surely, 2^202101122161 is an apocalyptic number.

It is an amenable number.

202101122161 is a deficient number, since it is larger than the sum of its proper divisors (1).

202101122161 is an equidigital number, since it uses as much as digits as its factorization.

202101122161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 202101122161 its reverse (161221101202), we get a palindrome (363322223363).

The spelling of 202101122161 in words is "two hundred two billion, one hundred one million, one hundred twenty-two thousand, one hundred sixty-one".