22212002081 has 2 divisors, whose sum is σ = 22212002082. Its totient is φ = 22212002080.

The previous prime is 22212002077. The next prime is 22212002093. The reversal of 22212002081 is 18020021222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21957312400 + 254689681 = 148180^2 + 15959^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212002081 - 2² = 22212002077 is a prime.

It is a super-2 number, since 2×22212002081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22212002381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106001040 + 11106001041.

It is an arithmetic number, because the mean of its divisors is an integer number (11106001041).

Almost surely, 2^22212002081 is an apocalyptic number.

It is an amenable number.

22212002081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212002081 is an equidigital number, since it uses as much as digits as its factorization.

22212002081 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.

The spelling of 22212002081 in words is "twenty-two billion, two hundred twelve million, two thousand, eighty-one".