221200111200 has 72 divisors (see below), whose sum is σ = 720006369768. Its totient is φ = 58986695680.

The previous prime is 221200111163. The next prime is 221200111201. The reversal of 221200111200 is 2111002122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200111201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46080957 + ... + 46085756.

It is an arithmetic number, because the mean of its divisors is an integer number (10000088469).

Almost surely, 2^221200111200 is an apocalyptic number.

221200111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221200111200 is an abundant number, since it is smaller than the sum of its proper divisors (498806258568).

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

221200111200 is a wasteful number, since it uses less digits than its factorization.

221200111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92166736 (or 92166723 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221200111200 its reverse (2111002122), we get a palindrome (223311113322).

The spelling of 221200111200 in words is "two hundred twenty-one billion, two hundred million, one hundred eleven thousand, two hundred".