221220103 has 8 divisors (see below), whose sum is σ = 238378448. Its totient is φ = 204081984.

The previous prime is 221220101. The next prime is 221220107. The reversal of 221220103 is 301022122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221220103 - 2¹ = 221220101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23800 + ... + 31762.

It is an arithmetic number, because the mean of its divisors is an integer number (29797306).

Almost surely, 2^221220103 is an apocalyptic number.

221220103 is a deficient number, since it is larger than the sum of its proper divisors (17158345).

221220103 is a wasteful number, since it uses less digits than its factorization.

221220103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10113.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221220103 is about 14873.4697700301. The cubic root of 221220103 is about 604.7950064778.

Adding to 221220103 its reverse (301022122), we get a palindrome (522242225).

The spelling of 221220103 in words is "two hundred twenty-one million, two hundred twenty thousand, one hundred three".