221211103 has 4 divisors (see below), whose sum is σ = 222334200. Its totient is φ = 220088008.

The previous prime is 221211083. The next prime is 221211127. The reversal of 221211103 is 301112122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301112122 = 2 ⋅150556061.

It is a cyclic number.

It is not a de Polignac number, because 221211103 - 2¹³ = 221202911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561253 + ... + 561646.

It is an arithmetic number, because the mean of its divisors is an integer number (55583550).

Almost surely, 2^221211103 is an apocalyptic number.

221211103 is a deficient number, since it is larger than the sum of its proper divisors (1123097).

221211103 is a wasteful number, since it uses less digits than its factorization.

221211103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123096.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 221211103 is about 14873.1672148201. The cubic root of 221211103 is about 604.7868046480.

Adding to 221211103 its reverse (301112122), we get a palindrome (522323225).

The spelling of 221211103 in words is "two hundred twenty-one million, two hundred eleven thousand, one hundred three".