221224101 has 8 divisors (see below), whose sum is σ = 337103424. Its totient is φ = 126413760.

The previous prime is 221224079. The next prime is 221224109. The reversal of 221224101 is 101422122.

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

It is not a de Polignac number, because 221224101 - 2²¹ = 219126949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221224109) 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, 5267220 + ... + 5267261.

It is an arithmetic number, because the mean of its divisors is an integer number (42137928).

Almost surely, 2^221224101 is an apocalyptic number.

221224101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221224101 is a deficient number, since it is larger than the sum of its proper divisors (115879323).

221224101 is a wasteful number, since it uses less digits than its factorization.

221224101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10534491.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221224101 is about 14873.6041698036. The cubic root of 221224101 is about 604.7986498414.

Adding to 221224101 its reverse (101422122), we get a palindrome (322646223).

The spelling of 221224101 in words is "two hundred twenty-one million, two hundred twenty-four thousand, one hundred one".