2331123131 has 4 divisors (see below), whose sum is σ = 2332373592. Its totient is φ = 2329872672.

The previous prime is 2331123083. The next prime is 2331123149. The reversal of 2331123131 is 1313211332.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2331123131 - 2¹⁰ = 2331122107 is a prime.

It is a super-2 number, since 2×2331123131² = 10868270103766486322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2331123331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622430 + ... + 626163.

It is an arithmetic number, because the mean of its divisors is an integer number (583093398).

Almost surely, 2^2331123131 is an apocalyptic number.

2331123131 is a deficient number, since it is larger than the sum of its proper divisors (1250461).

2331123131 is a wasteful number, since it uses less digits than its factorization.

2331123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250460.

The product of its digits is 324, while the sum is 20.

The square root of 2331123131 is about 48281.7059661317. The cubic root of 2331123131 is about 1325.9334835941.

Adding to 2331123131 its reverse (1313211332), we get a palindrome (3644334463).

The spelling of 2331123131 in words is "two billion, three hundred thirty-one million, one hundred twenty-three thousand, one hundred thirty-one".