12440132331 has 12 divisors (see below), whose sum is σ = 18231819816. Its totient is φ = 7539473920.

The previous prime is 12440132323. The next prime is 12440132377. The reversal of 12440132331 is 13323104421.

It is a happy number.

It is not a de Polignac number, because 12440132331 - 2³ = 12440132323 is a prime.

It is a super-2 number, since 2×12440132331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12440132311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17134806 + ... + 17135531.

It is an arithmetic number, because the mean of its divisors is an integer number (1519318318).

Almost surely, 2^12440132331 is an apocalyptic number.

12440132331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12440132331 is a deficient number, since it is larger than the sum of its proper divisors (5791687485).

12440132331 is a wasteful number, since it uses less digits than its factorization.

12440132331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34270362 (or 34270351 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 12440132331 its reverse (13323104421), we get a palindrome (25763236752).

The spelling of 12440132331 in words is "twelve billion, four hundred forty million, one hundred thirty-two thousand, three hundred thirty-one".