221213103 has 16 divisors (see below), whose sum is σ = 308192256. Its totient is φ = 140872160.

The previous prime is 221213099. The next prime is 221213123. The reversal of 221213103 is 301312122.

It is a cyclic number.

It is not a de Polignac number, because 221213103 - 2² = 221213099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221213123) 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, 63226 + ... + 66632.

It is an arithmetic number, because the mean of its divisors is an integer number (19262016).

Almost surely, 2^221213103 is an apocalyptic number.

221213103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221213103 is a deficient number, since it is larger than the sum of its proper divisors (86979153).

221213103 is a wasteful number, since it uses less digits than its factorization.

221213103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374.

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

The square root of 221213103 is about 14873.2344498431. The cubic root of 221213103 is about 604.7886272961.

Adding to 221213103 its reverse (301312122), we get a palindrome (522525225).

The spelling of 221213103 in words is "two hundred twenty-one million, two hundred thirteen thousand, one hundred three".