12001001002000 has 160 divisors (see below), whose sum is σ = 29555420903424. Its totient is φ = 4712190336000.

The previous prime is 12001001001967. The next prime is 12001001002019. The reversal of 12001001002000 is 20010010021.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30611217 + ... + 31000783.

Almost surely, 2^{12001001002000} is an apocalyptic number.

12001001002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12001001002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14777710451712).

12001001002000 is an abundant number, since it is smaller than the sum of its proper divisors (17554419901424).

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

12001001002000 is a wasteful number, since it uses less digits than its factorization.

12001001002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389874 (or 389858 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 12001001002000 its reverse (20010010021), we get a palindrome (12021011012021).

The spelling of 12001001002000 in words is "twelve trillion, one billion, one million, two thousand".