12312234140 has 12 divisors (see below), whose sum is σ = 25855691736. Its totient is φ = 4924893648.

The previous prime is 12312234131. The next prime is 12312234197. The reversal of 12312234140 is 4143221321.

It is a super-2 number, since 2×12312234140² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 307805834 + ... + 307805873.

It is an arithmetic number, because the mean of its divisors is an integer number (2154640978).

Almost surely, 2^12312234140 is an apocalyptic number.

12312234140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312234140 is an abundant number, since it is smaller than the sum of its proper divisors (13543457596).

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

12312234140 is a wasteful number, since it uses less digits than its factorization.

12312234140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615611716 (or 615611714 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12312234140 its reverse (4143221321), we get a palindrome (16455455461).

The spelling of 12312234140 in words is "twelve billion, three hundred twelve million, two hundred thirty-four thousand, one hundred forty".