221231103 has 16 divisors (see below), whose sum is σ = 303548256. Its totient is φ = 143216640.

The previous prime is 221231077. The next prime is 221231137. The reversal of 221231103 is 301132122.

It is not a de Polignac number, because 221231103 - 2⁸ = 221230847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232103) 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, 64143 + ... + 67503.

It is an arithmetic number, because the mean of its divisors is an integer number (18971766).

Almost surely, 2^221231103 is an apocalyptic number.

221231103 is a deficient number, since it is larger than the sum of its proper divisors (82317153).

221231103 is a wasteful number, since it uses less digits than its factorization.

221231103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3994.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 221231103 is about 14873.8395513734. The cubic root of 221231103 is about 604.8050306343.

Adding to 221231103 its reverse (301132122), we get a palindrome (522363225).

The spelling of 221231103 in words is "two hundred twenty-one million, two hundred thirty-one thousand, one hundred three".