12312002120 has 64 divisors (see below), whose sum is σ = 31534323840. Its totient is φ = 4282432000.

The previous prime is 12312002063. The next prime is 12312002137. The reversal of 12312002120 is 2120021321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12312002095 and 12312002104.

It is an unprimeable number.

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, 598181 + ... + 618420.

It is an arithmetic number, because the mean of its divisors is an integer number (492723810).

Almost surely, 2^12312002120 is an apocalyptic number.

12312002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312002120 is an abundant number, since it is smaller than the sum of its proper divisors (19222321720).

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

12312002120 is a wasteful number, since it uses less digits than its factorization.

12312002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216646 (or 1216642 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12312002120 its reverse (2120021321), we get a palindrome (14432023441).

The spelling of 12312002120 in words is "twelve billion, three hundred twelve million, two thousand, one hundred twenty".