123231001213 has 2 divisors, whose sum is σ = 123231001214. Its totient is φ = 123231001212.

The previous prime is 123231001193. The next prime is 123231001217. The reversal of 123231001213 is 312100132321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81440602884 + 41790398329 = 285378^2 + 204427^2 .

It is a cyclic number.

It is not a de Polignac number, because 123231001213 - 2²¹ = 123228904061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123231001217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61615500606 + 61615500607.

It is an arithmetic number, because the mean of its divisors is an integer number (61615500607).

Almost surely, 2^123231001213 is an apocalyptic number.

It is an amenable number.

123231001213 is a deficient number, since it is larger than the sum of its proper divisors (1).

123231001213 is an equidigital number, since it uses as much as digits as its factorization.

123231001213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123231001213 its reverse (312100132321), we get a palindrome (435331133534).

The spelling of 123231001213 in words is "one hundred twenty-three billion, two hundred thirty-one million, one thousand, two hundred thirteen".