22120222181 has 2 divisors, whose sum is σ = 22120222182. Its totient is φ = 22120222180.

The previous prime is 22120222177. The next prime is 22120222211. The reversal of 22120222181 is 18122202122.

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., 18044548900 + 4075673281 = 134330^2 + 63841^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120222181 - 2² = 22120222177 is a prime.

It is a super-2 number, since 2×22120222181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22120212181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060111090 + 11060111091.

It is an arithmetic number, because the mean of its divisors is an integer number (11060111091).

Almost surely, 2^22120222181 is an apocalyptic number.

It is an amenable number.

22120222181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22120222181 is an equidigital number, since it uses as much as digits as its factorization.

22120222181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

The spelling of 22120222181 in words is "twenty-two billion, one hundred twenty million, two hundred twenty-two thousand, one hundred eighty-one".