202100222081 has 2 divisors, whose sum is σ = 202100222082. Its totient is φ = 202100222080.

The previous prime is 202100222063. The next prime is 202100222099. The reversal of 202100222081 is 180222001202.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (202100222063) and next prime (202100222099).

It can be written as a sum of positive squares in only one way, i.e., 198907972081 + 3192250000 = 445991^2 + 56500^2 .

It is a cyclic number.

It is not a de Polignac number, because 202100222081 - 2¹⁸ = 202099959937 is a prime.

It is a super-2 number, since 2×202100222081² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (202100222281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050111040 + 101050111041.

It is an arithmetic number, because the mean of its divisors is an integer number (101050111041).

Almost surely, 2^202100222081 is an apocalyptic number.

It is an amenable number.

202100222081 is a deficient number, since it is larger than the sum of its proper divisors (1).

202100222081 is an equidigital number, since it uses as much as digits as its factorization.

202100222081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 202100222081 its reverse (180222001202), we get a palindrome (382322223283).

The spelling of 202100222081 in words is "two hundred two billion, one hundred million, two hundred twenty-two thousand, eighty-one".