12031420512 has 48 divisors (see below), whose sum is σ = 31613137920. Its totient is φ = 4006580352.

The previous prime is 12031420507. The next prime is 12031420549. The reversal of 12031420512 is 21502413021.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39433 + ... + 160055.

It is an arithmetic number, because the mean of its divisors is an integer number (658607040).

Almost surely, 2^12031420512 is an apocalyptic number.

12031420512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12031420512 is an abundant number, since it is smaller than the sum of its proper divisors (19581717408).

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

12031420512 is a wasteful number, since it uses less digits than its factorization.

12031420512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121675 (or 121667 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12031420512 its reverse (21502413021), we get a palindrome (33533833533).

The spelling of 12031420512 in words is "twelve billion, thirty-one million, four hundred twenty thousand, five hundred twelve".