221021113200 has 120 divisors (see below), whose sum is σ = 727139696688. Its totient is φ = 57346007040.

The previous prime is 221021113177. The next prime is 221021113273. The reversal of 221021113200 is 2311120122.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a self number, because there is not a number n which added to its sum of digits gives 221021113200.

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, 2444577 + ... + 2533376.

Almost surely, 2^221021113200 is an apocalyptic number.

221021113200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221021113200 is an abundant number, since it is smaller than the sum of its proper divisors (506118583488).

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

221021113200 is a wasteful number, since it uses less digits than its factorization.

221021113200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978011 (or 4978000 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 221021113200 its reverse (2311120122), we get a palindrome (223332233322).

The spelling of 221021113200 in words is "two hundred twenty-one billion, twenty-one million, one hundred thirteen thousand, two hundred".