12123131103 has 12 divisors (see below), whose sum is σ = 18541259568. Its totient is φ = 7606670400.

The previous prime is 12123131017. The next prime is 12123131117. The reversal of 12123131103 is 30113132121.

12123131103 is a `hidden beast` number, since 121 + 231 + 311 + 0 + 3 = 666.

It is not a de Polignac number, because 12123131103 - 2¹⁴ = 12123114719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123131803) 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, 39617923 + ... + 39618228.

It is an arithmetic number, because the mean of its divisors is an integer number (1545104964).

Almost surely, 2^12123131103 is an apocalyptic number.

12123131103 is a deficient number, since it is larger than the sum of its proper divisors (6418128465).

12123131103 is a wasteful number, since it uses less digits than its factorization.

12123131103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79236174 (or 79236171 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 12123131103 its reverse (30113132121), we get a palindrome (42236263224).

The spelling of 12123131103 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-one thousand, one hundred three".