12312403234420 has 24 divisors (see below), whose sum is σ = 26457350207904. Its totient is φ = 4810427309856.

The previous prime is 12312403234409. The next prime is 12312403234423. The reversal of 12312403234420 is 2443230421321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312403234423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7158373114 + ... + 7158374833.

It is an arithmetic number, because the mean of its divisors is an integer number (1102389591996).

Almost surely, 2^{12312403234420} is an apocalyptic number.

12312403234420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312403234420 is an abundant number, since it is smaller than the sum of its proper divisors (14144946973484).

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

12312403234420 is a wasteful number, since it uses less digits than its factorization.

12312403234420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14316747999 (or 14316747997 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 12312403234420 its reverse (2443230421321), we get a palindrome (14755633655741).

The spelling of 12312403234420 in words is "twelve trillion, three hundred twelve billion, four hundred three million, two hundred thirty-four thousand, four hundred twenty".