12012002000 has 80 divisors (see below), whose sum is σ = 29069157312. Its totient is φ = 4800809600.

The previous prime is 12012001999. The next prime is 12012002021. The reversal of 12012002000 is 20021021.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 4052519 + ... + 4055481.

Almost surely, 2^12012002000 is an apocalyptic number.

12012002000 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 12012002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14534578656).

12012002000 is an abundant number, since it is smaller than the sum of its proper divisors (17057155312).

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

12012002000 is a wasteful number, since it uses less digits than its factorization.

12012002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013 (or 4997 counting only the distinct ones).

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

Adding to 12012002000 its reverse (20021021), we get a palindrome (12032023021).

The spelling of 12012002000 in words is "twelve billion, twelve million, two thousand".