123112131 has 8 divisors (see below), whose sum is σ = 164219904. Its totient is φ = 82039560.

The previous prime is 123112103. The next prime is 123112151. The reversal of 123112131 is 131211321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123112131 - 2⁹ = 123111619 is a prime.

It is a super-2 number, since 2×123112131² = 30313193598722322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123112131.

It is not an unprimeable number, because it can be changed into a prime (123112151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 886 + ... + 15716.

It is an arithmetic number, because the mean of its divisors is an integer number (20527488).

Almost surely, 2^123112131 is an apocalyptic number.

123112131 is a deficient number, since it is larger than the sum of its proper divisors (41107773).

123112131 is a wasteful number, since it uses less digits than its factorization.

123112131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17601.

The product of its digits is 36, while the sum is 15.

The square root of 123112131 is about 11095.5906106886. The cubic root of 123112131 is about 497.4700617490.

Adding to 123112131 its reverse (131211321), we get a palindrome (254323452).

The spelling of 123112131 in words is "one hundred twenty-three million, one hundred twelve thousand, one hundred thirty-one".