2122200181 has 2 divisors, whose sum is σ = 2122200182. Its totient is φ = 2122200180.

The previous prime is 2122200167. The next prime is 2122200209. The reversal of 2122200181 is 1810022212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1335902500 + 786297681 = 36550^2 + 28041^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122200181 - 2⁷ = 2122200053 is a prime.

It is a super-2 number, since 2×2122200181² = 9007467216472865522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122200121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061100090 + 1061100091.

It is an arithmetic number, because the mean of its divisors is an integer number (1061100091).

Almost surely, 2^2122200181 is an apocalyptic number.

It is an amenable number.

2122200181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122200181 is an equidigital number, since it uses as much as digits as its factorization.

2122200181 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 square root of 2122200181 is about 46067.3439759663. The cubic root of 2122200181 is about 1285.0759100639.

Adding to 2122200181 its reverse (1810022212), we get a palindrome (3932222393).

The spelling of 2122200181 in words is "two billion, one hundred twenty-two million, two hundred thousand, one hundred eighty-one".