202101202081 has 2 divisors, whose sum is σ = 202101202082. Its totient is φ = 202101202080.

The previous prime is 202101202033. The next prime is 202101202123. The reversal of 202101202081 is 180202101202.

202101202081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200224926225 + 1876275856 = 447465^2 + 43316^2 .

It is a cyclic number.

It is not a de Polignac number, because 202101202081 - 2²⁷ = 201966984353 is a prime.

It is a super-2 number, since 2×202101202081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (202101202001) 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, 101050601040 + 101050601041.

It is an arithmetic number, because the mean of its divisors is an integer number (101050601041).

Almost surely, 2^202101202081 is an apocalyptic number.

It is an amenable number.

202101202081 is a deficient number, since it is larger than the sum of its proper divisors (1).

202101202081 is an equidigital number, since it uses as much as digits as its factorization.

202101202081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202101202081 its reverse (180202101202), we get a palindrome (382303303283).

The spelling of 202101202081 in words is "two hundred two billion, one hundred one million, two hundred two thousand, eighty-one".