22202021081 has 2 divisors, whose sum is σ = 22202021082. Its totient is φ = 22202021080.

The previous prime is 22202020969. The next prime is 22202021089. The reversal of 22202021081 is 18012020222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17457015625 + 4745005456 = 132125^2 + 68884^2 .

It is a cyclic number.

It is not a de Polignac number, because 22202021081 - 2³⁰ = 21128279257 is a prime.

It is a super-2 number, since 2×22202021081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22202021089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11101010540 + 11101010541.

It is an arithmetic number, because the mean of its divisors is an integer number (11101010541).

Almost surely, 2^22202021081 is an apocalyptic number.

It is an amenable number.

22202021081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22202021081 is an equidigital number, since it uses as much as digits as its factorization.

22202021081 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 22202021081 in words is "twenty-two billion, two hundred two million, twenty-one thousand, eighty-one".