221201121200 has 30 divisors (see below), whose sum is σ = 531435694644. Its totient is φ = 88480448320.

The previous prime is 221201121199. The next prime is 221201121257. The reversal of 221201121200 is 2121102122.

221201121200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276501002 + ... + 276501801.

Almost surely, 2^221201121200 is an apocalyptic number.

221201121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221201121200 is an abundant number, since it is smaller than the sum of its proper divisors (310234573444).

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

221201121200 is a wasteful number, since it uses less digits than its factorization.

221201121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553002821 (or 553002810 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221201121200 its reverse (2121102122), we get a palindrome (223322223322).

The spelling of 221201121200 in words is "two hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, two hundred".