22118211 has 16 divisors (see below), whose sum is σ = 33531520. Its totient is φ = 14401800.

The previous prime is 22118179. The next prime is 22118227. The reversal of 22118211 is 11281122.

It is not a de Polignac number, because 22118211 - 2⁵ = 22118179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22118251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8365 + ... + 10686.

It is an arithmetic number, because the mean of its divisors is an integer number (2095720).

Almost surely, 2^22118211 is an apocalyptic number.

22118211 is a deficient number, since it is larger than the sum of its proper divisors (11413309).

22118211 is a wasteful number, since it uses less digits than its factorization.

22118211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19103 (or 19097 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 22118211 is about 4703.0002126302. Note that the first 3 decimals coincide. The cubic root of 22118211 is about 280.7049033301.

Adding to 22118211 its reverse (11281122), we get a palindrome (33399333).

The spelling of 22118211 in words is "twenty-two million, one hundred eighteen thousand, two hundred eleven".