221321130203 has 12 divisors (see below), whose sum is σ = 236396969928. Its totient is φ = 207146445120.

The previous prime is 221321130169. The next prime is 221321130209. The reversal of 221321130203 is 302031123122.

It is not a de Polignac number, because 221321130203 - 2¹⁶ = 221321064667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221321130209) 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, 3663278 + ... + 3723203.

It is an arithmetic number, because the mean of its divisors is an integer number (19699747494).

Almost surely, 2^221321130203 is an apocalyptic number.

221321130203 is a deficient number, since it is larger than the sum of its proper divisors (15075839725).

221321130203 is an equidigital number, since it uses as much as digits as its factorization.

221321130203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7386602 (or 7386583 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221321130203 its reverse (302031123122), we get a palindrome (523352253325).

The spelling of 221321130203 in words is "two hundred twenty-one billion, three hundred twenty-one million, one hundred thirty thousand, two hundred three".