12002120000 has 140 divisors (see below), whose sum is σ = 32052080676. Its totient is φ = 4431360000.

The previous prime is 12002119979. The next prime is 12002120023. The reversal of 12002120000 is 2120021.

It can be written as a sum of positive squares in 10 ways, for example, as 10952878336 + 1049241664 = 104656^2 + 32392^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 12002120000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 508460 + ... + 531540.

Almost surely, 2^12002120000 is an apocalyptic number.

12002120000 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 12002120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16026040338).

12002120000 is an abundant number, since it is smaller than the sum of its proper divisors (20049960676).

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

12002120000 is an equidigital number, since it uses as much as digits as its factorization.

12002120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23126 (or 23101 counting only the distinct ones).

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

Adding to 12002120000 its reverse (2120021), we get a palindrome (12004240021).

The spelling of 12002120000 in words is "twelve billion, two million, one hundred twenty thousand".