2222218123949 has 2 divisors, whose sum is σ = 2222218123950. Its totient is φ = 2222218123948.

The previous prime is 2222218123883. The next prime is 2222218123999. The reversal of 2222218123949 is 9493218122222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1488485401225 + 733732722724 = 1220035^2 + 856582^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222218123949 - 2²⁰ = 2222217075373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2222218123999) 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, 1111109061974 + 1111109061975.

It is an arithmetic number, because the mean of its divisors is an integer number (1111109061975).

Almost surely, 2^{2222218123949} is an apocalyptic number.

It is an amenable number.

2222218123949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222218123949 is an equidigital number, since it uses as much as digits as its factorization.

2222218123949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 47.

The spelling of 2222218123949 in words is "two trillion, two hundred twenty-two billion, two hundred eighteen million, one hundred twenty-three thousand, nine hundred forty-nine".