222222121999 has 2 divisors, whose sum is σ = 222222122000. Its totient is φ = 222222121998.

The previous prime is 222222121981. The next prime is 222222122009. The reversal of 222222121999 is 999121222222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222222121999 - 2⁷ = 222222121871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222222121699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111111060999 + 111111061000.

It is an arithmetic number, because the mean of its divisors is an integer number (111111061000).

Almost surely, 2^222222121999 is an apocalyptic number.

222222121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

222222121999 is an equidigital number, since it uses as much as digits as its factorization.

222222121999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The spelling of 222222121999 in words is "two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, nine hundred ninety-nine".