123131253107 has 2 divisors, whose sum is σ = 123131253108. Its totient is φ = 123131253106.

The previous prime is 123131253083. The next prime is 123131253163. The reversal of 123131253107 is 701352131321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123131253107 is a prime.

It is a super-2 number, since 2×123131253107² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123131253107.

It is not a weakly prime, because it can be changed into another prime (123131253407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61565626553 + 61565626554.

It is an arithmetic number, because the mean of its divisors is an integer number (61565626554).

Almost surely, 2^123131253107 is an apocalyptic number.

123131253107 is a deficient number, since it is larger than the sum of its proper divisors (1).

123131253107 is an equidigital number, since it uses as much as digits as its factorization.

123131253107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

Adding to 123131253107 its reverse (701352131321), we get a palindrome (824483384428).

The spelling of 123131253107 in words is "one hundred twenty-three billion, one hundred thirty-one million, two hundred fifty-three thousand, one hundred seven".