222119921 has 2 divisors, whose sum is σ = 222119922. Its totient is φ = 222119920.

The previous prime is 222119893. The next prime is 222119923. The reversal of 222119921 is 129911222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217120225 + 4999696 = 14735^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 222119921 - 2¹⁴ = 222103537 is a prime.

Together with 222119923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222119923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111059960 + 111059961.

It is an arithmetic number, because the mean of its divisors is an integer number (111059961).

Almost surely, 2^222119921 is an apocalyptic number.

It is an amenable number.

222119921 is a deficient number, since it is larger than the sum of its proper divisors (1).

222119921 is an equidigital number, since it uses as much as digits as its factorization.

222119921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 29.

The square root of 222119921 is about 14903.6881676986. The cubic root of 222119921 is about 605.6139031821.

The spelling of 222119921 in words is "two hundred twenty-two million, one hundred nineteen thousand, nine hundred twenty-one".