12011001200 has 120 divisors (see below), whose sum is σ = 31517970816. Its totient is φ = 4362336000.

The previous prime is 12011001173. The next prime is 12011001217. The reversal of 12011001200 is 210011021.

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 23 ways as a sum of consecutive naturals, for example, 6735509 + ... + 6737291.

Almost surely, 2^12011001200 is an apocalyptic number.

12011001200 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 12011001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15758985408).

12011001200 is an abundant number, since it is smaller than the sum of its proper divisors (19506969616).

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

12011001200 is a wasteful number, since it uses less digits than its factorization.

12011001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343 (or 3332 counting only the distinct ones).

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

Adding to 12011001200 its reverse (210011021), we get a palindrome (12221012221).

The spelling of 12011001200 in words is "twelve billion, eleven million, one thousand, two hundred".