12312012340 has 48 divisors (see below), whose sum is σ = 27385549632. Its totient is φ = 4633514496.

The previous prime is 12312012329. The next prime is 12312012347. The reversal of 12312012340 is 4321021321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312012347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1561087 + ... + 1568953.

It is an arithmetic number, because the mean of its divisors is an integer number (570532284).

Almost surely, 2^12312012340 is an apocalyptic number.

12312012340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312012340 is an abundant number, since it is smaller than the sum of its proper divisors (15073537292).

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

12312012340 is a wasteful number, since it uses less digits than its factorization.

12312012340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12496 (or 12494 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12312012340 its reverse (4321021321), we get a palindrome (16633033661).

It can be divided in two parts, 123120 and 12340, that added together give a triangular number (135460 = T₅₂₀).

The spelling of 12312012340 in words is "twelve billion, three hundred twelve million, twelve thousand, three hundred forty".