12001272000 has 224 divisors, whose sum is σ = 40192049664. Its totient is φ = 3154816000.

The previous prime is 12001271999. The next prime is 12001272053. The reversal of 12001272000 is 27210021.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 1700479 + ... + 1707521.

Almost surely, 2^12001272000 is an apocalyptic number.

12001272000 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 12001272000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20096024832).

12001272000 is an abundant number, since it is smaller than the sum of its proper divisors (28190777664).

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

12001272000 is an equidigital number, since it uses as much as digits as its factorization.

12001272000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144 (or 7124 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

Adding to 12001272000 its reverse (27210021), we get a palindrome (12028482021).

The spelling of 12001272000 in words is "twelve billion, one million, two hundred seventy-two thousand".