222121307 has 2 divisors, whose sum is σ = 222121308. Its totient is φ = 222121306.

The previous prime is 222121301. The next prime is 222121309. The reversal of 222121307 is 703121222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222121307 - 2²⁴ = 205344091 is a prime.

Together with 222121309, 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 (222121301) 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, 111060653 + 111060654.

It is an arithmetic number, because the mean of its divisors is an integer number (111060654).

Almost surely, 2^222121307 is an apocalyptic number.

222121307 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121307 is an equidigital number, since it uses as much as digits as its factorization.

222121307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 222121307 is about 14903.7346661835. The cubic root of 222121307 is about 605.6151628307.

Adding to 222121307 its reverse (703121222), we get a palindrome (925242529).

The spelling of 222121307 in words is "two hundred twenty-two million, one hundred twenty-one thousand, three hundred seven".