12031023140 has 12 divisors (see below), whose sum is σ = 25265148636. Its totient is φ = 4812409248.

The previous prime is 12031023139. The next prime is 12031023163. The reversal of 12031023140 is 4132013021.

It can be written as a sum of positive squares in 2 ways, for example, as 2090135524 + 9940887616 = 45718^2 + 99704^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300775559 + ... + 300775598.

It is an arithmetic number, because the mean of its divisors is an integer number (2105429053).

Almost surely, 2^12031023140 is an apocalyptic number.

12031023140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12031023140 is an abundant number, since it is smaller than the sum of its proper divisors (13234125496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12031023140 is a wasteful number, since it uses less digits than its factorization.

12031023140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601551166 (or 601551164 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12031023140 its reverse (4132013021), we get a palindrome (16163036161).

The spelling of 12031023140 in words is "twelve billion, thirty-one million, twenty-three thousand, one hundred forty".