22120020281 has 2 divisors, whose sum is σ = 22120020282. Its totient is φ = 22120020280.

The previous prime is 22120020277. The next prime is 22120020287. The reversal of 22120020281 is 18202002122.

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., 21803180281 + 316840000 = 147659^2 + 17800^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120020281 - 2² = 22120020277 is a prime.

It is a super-2 number, since 2×22120020281² (a number of 21 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 (22120020287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060010140 + 11060010141.

It is an arithmetic number, because the mean of its divisors is an integer number (11060010141).

Almost surely, 2^22120020281 is an apocalyptic number.

It is an amenable number.

22120020281 is a deficient number, since it is larger than the sum of its proper divisors (1).

22120020281 is an equidigital number, since it uses as much as digits as its factorization.

22120020281 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 22120020281 in words is "twenty-two billion, one hundred twenty million, twenty thousand, two hundred eighty-one".