221220331103 has 4 divisors (see below), whose sum is σ = 228356470848. Its totient is φ = 214084191360.

The previous prime is 221220331037. The next prime is 221220331121. The reversal of 221220331103 is 301133022122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221220331103 - 2¹² = 221220327007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220331193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3568069826 + ... + 3568069887.

It is an arithmetic number, because the mean of its divisors is an integer number (57089117712).

Almost surely, 2^221220331103 is an apocalyptic number.

221220331103 is a deficient number, since it is larger than the sum of its proper divisors (7136139745).

221220331103 is an equidigital number, since it uses as much as digits as its factorization.

221220331103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136139744.

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

Adding to 221220331103 its reverse (301133022122), we get a palindrome (522353353225).

The spelling of 221220331103 in words is "two hundred twenty-one billion, two hundred twenty million, three hundred thirty-one thousand, one hundred three".