221317103 has 4 divisors (see below), whose sum is σ = 252933840. Its totient is φ = 189700368.

The previous prime is 221317099. The next prime is 221317121. The reversal of 221317103 is 301713122.

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 221317103 - 2² = 221317099 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 (221317123) 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, 15808358 + ... + 15808371.

It is an arithmetic number, because the mean of its divisors is an integer number (63233460).

Almost surely, 2^221317103 is an apocalyptic number.

221317103 is a deficient number, since it is larger than the sum of its proper divisors (31616737).

221317103 is an equidigital number, since it uses as much as digits as its factorization.

221317103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31616736.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 221317103 is about 14876.7302523101. The cubic root of 221317103 is about 604.8833898608.

The spelling of 221317103 in words is "two hundred twenty-one million, three hundred seventeen thousand, one hundred three".