2220123181 has 2 divisors, whose sum is σ = 2220123182. Its totient is φ = 2220123180.

The previous prime is 2220123163. The next prime is 2220123263. The reversal of 2220123181 is 1813210222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1314715081 + 905408100 = 36259^2 + 30090^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220123181 - 2⁵ = 2220123149 is a prime.

It is a super-2 number, since 2×2220123181² = 9857893877627117522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220123281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110061590 + 1110061591.

It is an arithmetic number, because the mean of its divisors is an integer number (1110061591).

Almost surely, 2^2220123181 is an apocalyptic number.

It is an amenable number.

2220123181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220123181 is an equidigital number, since it uses as much as digits as its factorization.

2220123181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2220123181 is about 47118.1831249890. The cubic root of 2220123181 is about 1304.5448775277.

The spelling of 2220123181 in words is "two billion, two hundred twenty million, one hundred twenty-three thousand, one hundred eighty-one".