123228251 has 2 divisors, whose sum is σ = 123228252. Its totient is φ = 123228250.

The previous prime is 123228211. The next prime is 123228253. The reversal of 123228251 is 152822321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123228251 - 2⁶ = 123228187 is a prime.

Together with 123228253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123228251.

It is not a weakly prime, because it can be changed into another prime (123228253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61614125 + 61614126.

It is an arithmetic number, because the mean of its divisors is an integer number (61614126).

Almost surely, 2^123228251 is an apocalyptic number.

123228251 is a deficient number, since it is larger than the sum of its proper divisors (1).

123228251 is an equidigital number, since it uses as much as digits as its factorization.

123228251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 123228251 is about 11100.8220866745. The cubic root of 123228251 is about 497.6264180474.

The spelling of 123228251 in words is "one hundred twenty-three million, two hundred twenty-eight thousand, two hundred fifty-one".