131231123 has 8 divisors (see below), whose sum is σ = 138477600. Its totient is φ = 124113088.

The previous prime is 131231071. The next prime is 131231131. The reversal of 131231123 is 321132131.

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

It is a cyclic number.

It is not a de Polignac number, because 131231123 - 2⁶ = 131231059 is a prime.

It is a super-2 number, since 2×131231123² = 34443215287682258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131231183) 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, 30008 + ... + 34101.

It is an arithmetic number, because the mean of its divisors is an integer number (17309700).

Almost surely, 2^131231123 is an apocalyptic number.

131231123 is a deficient number, since it is larger than the sum of its proper divisors (7246477).

131231123 is an equidigital number, since it uses as much as digits as its factorization.

131231123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64221.

The product of its digits is 108, while the sum is 17.

The square root of 131231123 is about 11455.6153479418. The cubic root of 131231123 is about 508.1738134120.

Adding to 131231123 its reverse (321132131), we get a palindrome (452363254).

The spelling of 131231123 in words is "one hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty-three".