121223239 has 2 divisors, whose sum is σ = 121223240. Its totient is φ = 121223238.

The previous prime is 121223231. The next prime is 121223257. The reversal of 121223239 is 932322121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121223239 - 2³ = 121223231 is a prime.

It is a super-2 number, since 2×121223239² = 29390147347302242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121223231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611619 + 60611620.

It is an arithmetic number, because the mean of its divisors is an integer number (60611620).

Almost surely, 2^121223239 is an apocalyptic number.

121223239 is a deficient number, since it is larger than the sum of its proper divisors (1).

121223239 is an equidigital number, since it uses as much as digits as its factorization.

121223239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 121223239 is about 11010.1425513024. The cubic root of 121223239 is about 494.9127336554.

The spelling of 121223239 in words is "one hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty-nine".