12123131 has 8 divisors (see below), whose sum is σ = 12668400. Its totient is φ = 11586400.

The previous prime is 12123107. The next prime is 12123151. The reversal of 12123131 is 13132121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123131 is a prime.

It is a super-2 number, since 2×12123131² = 293940610486322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12123101) 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, 860 + ... + 4998.

It is an arithmetic number, because the mean of its divisors is an integer number (1583550).

Almost surely, 2^12123131 is an apocalyptic number.

12123131 is a deficient number, since it is larger than the sum of its proper divisors (545269).

12123131 is a wasteful number, since it uses less digits than its factorization.

12123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269.

The product of its digits is 36, while the sum is 14.

The square root of 12123131 is about 3481.8286861935. The cubic root of 12123131 is about 229.7232398856.

Adding to 12123131 its reverse (13132121), we get a palindrome (25255252).

The spelling of 12123131 in words is "twelve million, one hundred twenty-three thousand, one hundred thirty-one".