12220002181 has 2 divisors, whose sum is σ = 12220002182. Its totient is φ = 12220002180.

The previous prime is 12220002149. The next prime is 12220002191. The reversal of 12220002181 is 18120002221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8955593956 + 3264408225 = 94634^2 + 57135^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220002181 - 2⁵ = 12220002149 is a prime.

It is a super-2 number, since 2×12220002181² (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 (12220002191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110001090 + 6110001091.

It is an arithmetic number, because the mean of its divisors is an integer number (6110001091).

Almost surely, 2^12220002181 is an apocalyptic number.

It is an amenable number.

12220002181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220002181 is an equidigital number, since it uses as much as digits as its factorization.

12220002181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

The spelling of 12220002181 in words is "twelve billion, two hundred twenty million, two thousand, one hundred eighty-one".