221200021203 has 16 divisors (see below), whose sum is σ = 343945612800. Its totient is φ = 126400011528.

The previous prime is 221200021199. The next prime is 221200021213. The reversal of 221200021203 is 302120002122.

It is a happy number.

It is not a de Polignac number, because 221200021203 - 2² = 221200021199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221200021213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107481975 + ... + 107484032.

It is an arithmetic number, because the mean of its divisors is an integer number (21496600800).

Almost surely, 2^221200021203 is an apocalyptic number.

221200021203 is a deficient number, since it is larger than the sum of its proper divisors (122745591597).

221200021203 is an equidigital number, since it uses as much as digits as its factorization.

221200021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214966031 (or 214966017 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 221200021203 its reverse (302120002122), we get a palindrome (523320023325).

The spelling of 221200021203 in words is "two hundred twenty-one billion, two hundred million, twenty-one thousand, two hundred three".