121223231 has 2 divisors, whose sum is σ = 121223232. Its totient is φ = 121223230.

The previous prime is 121223227. The next prime is 121223239. The reversal of 121223231 is 132322121.

It is a weak prime.

It is an emirp because it is prime and its reverse (132322121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121223231 - 2² = 121223227 is a prime.

It is a super-2 number, since 2×121223231² = 29390143468158722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121223239) 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, 60611615 + 60611616.

It is an arithmetic number, because the mean of its divisors is an integer number (60611616).

Almost surely, 2^121223231 is an apocalyptic number.

121223231 is a deficient number, since it is larger than the sum of its proper divisors (1).

121223231 is an equidigital number, since it uses as much as digits as its factorization.

121223231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 17.

The square root of 121223231 is about 11010.1421880010. The cubic root of 121223231 is about 494.9127227684.

Adding to 121223231 its reverse (132322121), we get a palindrome (253545352).

The spelling of 121223231 in words is "one hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty-one".