123311324291 has 2 divisors, whose sum is σ = 123311324292. Its totient is φ = 123311324290.

The previous prime is 123311324237. The next prime is 123311324303. The reversal of 123311324291 is 192423113321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123311324291 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (123311324791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61655662145 + 61655662146.

It is an arithmetic number, because the mean of its divisors is an integer number (61655662146).

Almost surely, 2^123311324291 is an apocalyptic number.

123311324291 is a deficient number, since it is larger than the sum of its proper divisors (1).

123311324291 is an equidigital number, since it uses as much as digits as its factorization.

123311324291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The spelling of 123311324291 in words is "one hundred twenty-three billion, three hundred eleven million, three hundred twenty-four thousand, two hundred ninety-one".