123131104 has 24 divisors (see below), whose sum is σ = 243876528. Its totient is φ = 61194240.

The previous prime is 123131093. The next prime is 123131131. The reversal of 123131104 is 401131321.

It is a super-2 number, since 2×123131104² = 30322537544517632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6177 + ... + 16864.

It is an arithmetic number, because the mean of its divisors is an integer number (10161522).

Almost surely, 2^123131104 is an apocalyptic number.

It is an amenable number.

123131104 is a deficient number, since it is larger than the sum of its proper divisors (120745424).

123131104 is a wasteful number, since it uses less digits than its factorization.

123131104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23218 (or 23210 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 123131104 is about 11096.4455570241. The cubic root of 123131104 is about 497.4956157286.

Adding to 123131104 its reverse (401131321), we get a palindrome (524262425).

The spelling of 123131104 in words is "one hundred twenty-three million, one hundred thirty-one thousand, one hundred four".