12001001978232 has 96 divisors (see below), whose sum is σ = 33552674513280. Its totient is φ = 3871119479040.

The previous prime is 12001001978219. The next prime is 12001001978233. The reversal of 12001001978232 is 23287910010021.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001001978233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56258238 + ... + 56471154.

It is an arithmetic number, because the mean of its divisors is an integer number (349507026180).

Almost surely, 2^{12001001978232} is an apocalyptic number.

12001001978232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12001001978232 is an abundant number, since it is smaller than the sum of its proper divisors (21551672535048).

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

12001001978232 is a wasteful number, since it uses less digits than its factorization.

12001001978232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238213 (or 238206 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

Adding to 12001001978232 its reverse (23287910010021), we get a palindrome (35288911988253).

The spelling of 12001001978232 in words is "twelve trillion, one billion, one million, nine hundred seventy-eight thousand, two hundred thirty-two".