221210012303 has 6 divisors (see below), whose sum is σ = 257325932736. Its totient is φ = 189608581932.

The previous prime is 221210012299. The next prime is 221210012323. The reversal of 221210012303 is 303210012122.

It is not a de Polignac number, because 221210012303 - 2² = 221210012299 is a prime.

It is a super-2 number, since 2×221210012303² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210012323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2257244975 + ... + 2257245072.

It is an arithmetic number, because the mean of its divisors is an integer number (42887655456).

Almost surely, 2^221210012303 is an apocalyptic number.

221210012303 is a deficient number, since it is larger than the sum of its proper divisors (36115920433).

221210012303 is an equidigital number, since it uses as much as digits as its factorization.

221210012303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514490061 (or 4514490054 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221210012303 its reverse (303210012122), we get a palindrome (524420024425).

The spelling of 221210012303 in words is "two hundred twenty-one billion, two hundred ten million, twelve thousand, three hundred three".