123251213 has 2 divisors, whose sum is σ = 123251214. Its totient is φ = 123251212.

The previous prime is 123251203. The next prime is 123251221. The reversal of 123251213 is 312152321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117115684 + 6135529 = 10822^2 + 2477^2 .

It is a cyclic number.

It is not a de Polignac number, because 123251213 - 2¹⁰ = 123250189 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 (123251203) 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, 61625606 + 61625607.

It is an arithmetic number, because the mean of its divisors is an integer number (61625607).

Almost surely, 2^123251213 is an apocalyptic number.

It is an amenable number.

123251213 is a deficient number, since it is larger than the sum of its proper divisors (1).

123251213 is an equidigital number, since it uses as much as digits as its factorization.

123251213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 123251213 is about 11101.8562862253. The cubic root of 123251213 is about 497.6573248892.

The spelling of 123251213 in words is "one hundred twenty-three million, two hundred fifty-one thousand, two hundred thirteen".