12351131240 has 32 divisors (see below), whose sum is σ = 31760052480. Its totient is φ = 4234673472.

The previous prime is 12351131173. The next prime is 12351131257. The reversal of 12351131240 is 4213115321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22055312 + ... + 22055871.

It is an arithmetic number, because the mean of its divisors is an integer number (992501640).

Almost surely, 2^12351131240 is an apocalyptic number.

12351131240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12351131240 is an abundant number, since it is smaller than the sum of its proper divisors (19408921240).

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

12351131240 is a wasteful number, since it uses less digits than its factorization.

12351131240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44111201 (or 44111197 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 12351131240 its reverse (4213115321), we get a palindrome (16564246561).

The spelling of 12351131240 in words is "twelve billion, three hundred fifty-one million, one hundred thirty-one thousand, two hundred forty".