12000021011000 has 128 divisors (see below), whose sum is σ = 30635908205760. Its totient is φ = 4363198528000.

The previous prime is 12000021010997. The next prime is 12000021011021. The reversal of 12000021011000 is 11012000021.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

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, 119332742 + ... + 119433258.

Almost surely, 2^{12000021011000} is an apocalyptic number.

12000021011000 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 12000021011000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15317954102880).

12000021011000 is an abundant number, since it is smaller than the sum of its proper divisors (18635887194760).

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

12000021011000 is a wasteful number, since it uses less digits than its factorization.

12000021011000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111402 (or 111388 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12000021011000 its reverse (11012000021), we get a palindrome (12011033011021).

The spelling of 12000021011000 in words is "twelve trillion, twenty-one million, eleven thousand".