121223279 has 2 divisors, whose sum is σ = 121223280. Its totient is φ = 121223278.

The previous prime is 121223273. The next prime is 121223351. The reversal of 121223279 is 972322121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121223279 - 2²⁴ = 104446063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121223273) 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, 60611639 + 60611640.

It is an arithmetic number, because the mean of its divisors is an integer number (60611640).

Almost surely, 2^121223279 is an apocalyptic number.

121223279 is a deficient number, since it is larger than the sum of its proper divisors (1).

121223279 is an equidigital number, since it uses as much as digits as its factorization.

121223279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 121223279 is about 11010.1443678092. The cubic root of 121223279 is about 494.9127880908.

The spelling of 121223279 in words is "one hundred twenty-one million, two hundred twenty-three thousand, two hundred seventy-nine".