202101011081 has 2 divisors, whose sum is σ = 202101011082. Its totient is φ = 202101011080.

The previous prime is 202101011071. The next prime is 202101011083. The reversal of 202101011081 is 180110101202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202032270400 + 68740681 = 449480^2 + 8291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202101011081 is a prime.

It is a super-3 number, since 3×202101011081³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 202101011083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (202101011083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050505540 + 101050505541.

It is an arithmetic number, because the mean of its divisors is an integer number (101050505541).

Almost surely, 2^202101011081 is an apocalyptic number.

It is an amenable number.

202101011081 is a deficient number, since it is larger than the sum of its proper divisors (1).

202101011081 is an equidigital number, since it uses as much as digits as its factorization.

202101011081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 202101011081 its reverse (180110101202), we get a palindrome (382211112283).

The spelling of 202101011081 in words is "two hundred two billion, one hundred one million, eleven thousand, eighty-one".