123131313223 has 2 divisors, whose sum is σ = 123131313224. Its totient is φ = 123131313222.

The previous prime is 123131313209. The next prime is 123131313233. The reversal of 123131313223 is 322313131321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123131313223 is a prime.

It is a super-2 number, since 2×123131313223² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123131313203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61565656611 + 61565656612.

It is an arithmetic number, because the mean of its divisors is an integer number (61565656612).

Almost surely, 2^123131313223 is an apocalyptic number.

123131313223 is a deficient number, since it is larger than the sum of its proper divisors (1).

123131313223 is an equidigital number, since it uses as much as digits as its factorization.

123131313223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

Adding to 123131313223 its reverse (322313131321), we get a palindrome (445444444544).

The spelling of 123131313223 in words is "one hundred twenty-three billion, one hundred thirty-one million, three hundred thirteen thousand, two hundred twenty-three".