12323531231420 has 48 divisors (see below), whose sum is σ = 26579884624608. Its totient is φ = 4796000098560.

The previous prime is 12323531231419. The next prime is 12323531231437. The reversal of 12323531231420 is 2413213532321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19717439 + ... + 20332841.

It is an arithmetic number, because the mean of its divisors is an integer number (553747596346).

Almost surely, 2^{12323531231420} is an apocalyptic number.

12323531231420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12323531231420 is an abundant number, since it is smaller than the sum of its proper divisors (14256353393188).

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

12323531231420 is a wasteful number, since it uses less digits than its factorization.

12323531231420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642510 (or 642508 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 12323531231420 its reverse (2413213532321), we get a palindrome (14736744763741).

The spelling of 12323531231420 in words is "twelve trillion, three hundred twenty-three billion, five hundred thirty-one million, two hundred thirty-one thousand, four hundred twenty".