12201021200 has 60 divisors (see below), whose sum is σ = 29362305588. Its totient is φ = 4872192000.

The previous prime is 12201021187. The next prime is 12201021229. The reversal of 12201021200 is 212010221.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1035294976 + 11165726224 = 32176^2 + 105668^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215024 + ... + 265776.

Almost surely, 2^12201021200 is an apocalyptic number.

12201021200 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 12201021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14681152794).

12201021200 is an abundant number, since it is smaller than the sum of its proper divisors (17161284388).

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

12201021200 is a wasteful number, since it uses less digits than its factorization.

12201021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51372 (or 51361 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12201021200 its reverse (212010221), we get a palindrome (12413031421).

The spelling of 12201021200 in words is "twelve billion, two hundred one million, twenty-one thousand, two hundred".