123031311312103 has 12 divisors (see below), whose sum is σ = 126914634958608. Its totient is φ = 119242569330080.

The previous prime is 123031311312089. The next prime is 123031311312121. The reversal of 123031311312103 is 301213113130321.

It is not a de Polignac number, because 123031311312103 - 2⁹ = 123031311311591 is a prime.

It is a super-2 number, since 2×123031311312103² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031311312193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248651926 + ... + 249146227.

It is an arithmetic number, because the mean of its divisors is an integer number (10576219579884).

Almost surely, 2^{123031311312103} is an apocalyptic number.

123031311312103 is a deficient number, since it is larger than the sum of its proper divisors (3883323646505).

123031311312103 is an frugal number, since it uses more digits than its factorization.

123031311312103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497798342 (or 497798283 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 123031311312103 its reverse (301213113130321), we get a palindrome (424244424442424).

The spelling of 123031311312103 in words is "one hundred twenty-three trillion, thirty-one billion, three hundred eleven million, three hundred twelve thousand, one hundred three".