12031012231 has 16 divisors (see below), whose sum is σ = 13897889280. Its totient is φ = 10201476960.

The previous prime is 12031012229. The next prime is 12031012277. The reversal of 12031012231 is 13221013021.

It is a cyclic number.

It is not a de Polignac number, because 12031012231 - 2¹ = 12031012229 is a prime.

It is a super-2 number, since 2×12031012231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031010231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481476 + ... + 505846.

It is an arithmetic number, because the mean of its divisors is an integer number (868618080).

Almost surely, 2^12031012231 is an apocalyptic number.

12031012231 is a deficient number, since it is larger than the sum of its proper divisors (1866877049).

12031012231 is a wasteful number, since it uses less digits than its factorization.

12031012231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25134.

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

Adding to 12031012231 its reverse (13221013021), we get a palindrome (25252025252).

The spelling of 12031012231 in words is "twelve billion, thirty-one million, twelve thousand, two hundred thirty-one".