122222279 has 2 divisors, whose sum is σ = 122222280. Its totient is φ = 122222278.

The previous prime is 122222267. The next prime is 122222281. The reversal of 122222279 is 972222221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122222279 is a prime.

Together with 122222281, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122222209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61111139 + 61111140.

It is an arithmetic number, because the mean of its divisors is an integer number (61111140).

Almost surely, 2^122222279 is an apocalyptic number.

122222279 is a deficient number, since it is larger than the sum of its proper divisors (1).

122222279 is an equidigital number, since it uses as much as digits as its factorization.

122222279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 122222279 is about 11055.4185357227. The cubic root of 122222279 is about 496.2685944977.

The spelling of 122222279 in words is "one hundred twenty-two million, two hundred twenty-two thousand, two hundred seventy-nine".