121223255 has 4 divisors (see below), whose sum is σ = 145467912. Its totient is φ = 96978600.

The previous prime is 121223239. The next prime is 121223257. The reversal of 121223255 is 552322121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121223255 - 2⁴ = 121223239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121223255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12122321 + ... + 12122330.

It is an arithmetic number, because the mean of its divisors is an integer number (36366978).

Almost surely, 2^121223255 is an apocalyptic number.

121223255 is a deficient number, since it is larger than the sum of its proper divisors (24244657).

121223255 is an equidigital number, since it uses as much as digits as its factorization.

121223255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24244656.

The product of its digits is 1200, while the sum is 23.

The square root of 121223255 is about 11010.1432779052. The cubic root of 121223255 is about 494.9127554296.

Adding to 121223255 its reverse (552322121), we get a palindrome (673545376).

The spelling of 121223255 in words is "one hundred twenty-one million, two hundred twenty-three thousand, two hundred fifty-five".