22221110 has 32 divisors (see below), whose sum is σ = 42273792. Its totient is φ = 8396640.

The previous prime is 22221109. The next prime is 22221161. The reversal of 22221110 is 1112222.

It is a happy number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 22221091 and 22221100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12497 + ... + 14163.

It is an arithmetic number, because the mean of its divisors is an integer number (1321056).

Almost surely, 2^22221110 is an apocalyptic number.

22221110 is a deficient number, since it is larger than the sum of its proper divisors (20052682).

22221110 is a wasteful number, since it uses less digits than its factorization.

22221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 22221110 is about 4713.9272374529. The cubic root of 22221110 is about 281.1395312662.

Adding to 22221110 its reverse (1112222), we get a palindrome (23333332).

The spelling of 22221110 in words is "twenty-two million, two hundred twenty-one thousand, one hundred ten".