221031231103 has 4 divisors (see below), whose sum is σ = 228161270848. Its totient is φ = 213901191360.

The previous prime is 221031231079. The next prime is 221031231151. The reversal of 221031231103 is 301132130122.

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 221031231103 - 2¹³ = 221031222911 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 (221031231503) 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, 3565019826 + ... + 3565019887.

It is an arithmetic number, because the mean of its divisors is an integer number (57040317712).

Almost surely, 2^221031231103 is an apocalyptic number.

221031231103 is a deficient number, since it is larger than the sum of its proper divisors (7130039745).

221031231103 is an equidigital number, since it uses as much as digits as its factorization.

221031231103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7130039744.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221031231103 its reverse (301132130122), we get a palindrome (522163361225).

The spelling of 221031231103 in words is "two hundred twenty-one billion, thirty-one million, two hundred thirty-one thousand, one hundred three".