123310133203531 has 2 divisors, whose sum is σ = 123310133203532. Its totient is φ = 123310133203530.

The previous prime is 123310133203513. The next prime is 123310133203541. The reversal of 123310133203531 is 135302331013321.

It is a happy number.

Together with previous prime (123310133203513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123310133203531 is a prime.

It is a super-2 number, since 2×123310133203531² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123310133203493 and 123310133203502.

It is not a weakly prime, because it can be changed into another prime (123310133203541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61655066601765 + 61655066601766.

It is an arithmetic number, because the mean of its divisors is an integer number (61655066601766).

Almost surely, 2^{123310133203531} is an apocalyptic number.

123310133203531 is a deficient number, since it is larger than the sum of its proper divisors (1).

123310133203531 is an equidigital number, since it uses as much as digits as its factorization.

123310133203531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 31.

Adding to 123310133203531 its reverse (135302331013321), we get a palindrome (258612464216852).

The spelling of 123310133203531 in words is "one hundred twenty-three trillion, three hundred ten billion, one hundred thirty-three million, two hundred three thousand, five hundred thirty-one".