221222113 has 12 divisors (see below), whose sum is σ = 258379632. Its totient is φ = 188853000.

The previous prime is 221222087. The next prime is 221222123. The reversal of 221222113 is 311222122.

It is a happy number.

It is not a de Polignac number, because 221222113 - 2¹³ = 221213921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221222123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3306 + ... + 21292.

It is an arithmetic number, because the mean of its divisors is an integer number (21531636).

Almost surely, 2^221222113 is an apocalyptic number.

It is an amenable number.

221222113 is a deficient number, since it is larger than the sum of its proper divisors (37157519).

221222113 is a wasteful number, since it uses less digits than its factorization.

221222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18252 (or 18245 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 221222113 is about 14873.5373398530. The cubic root of 221222113 is about 604.7968381893.

Adding to 221222113 its reverse (311222122), we get a palindrome (532444235).

Subtracting 221222113 from its reverse (311222122), we obtain a palindrome (90000009).

The spelling of 221222113 in words is "two hundred twenty-one million, two hundred twenty-two thousand, one hundred thirteen".