22211002081 has 2 divisors, whose sum is σ = 22211002082. Its totient is φ = 22211002080.

The previous prime is 22211002019. The next prime is 22211002123. The reversal of 22211002081 is 18020011222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15668780625 + 6542221456 = 125175^2 + 80884^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211002081 - 2⁹ = 22211001569 is a prime.

It is a super-2 number, since 2×22211002081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22211702081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105501040 + 11105501041.

It is an arithmetic number, because the mean of its divisors is an integer number (11105501041).

Almost surely, 2^22211002081 is an apocalyptic number.

It is an amenable number.

22211002081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211002081 is an equidigital number, since it uses as much as digits as its factorization.

22211002081 is an evil number, because the sum of its binary digits is even.

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

The spelling of 22211002081 in words is "twenty-two billion, two hundred eleven million, two thousand, eighty-one".