22112211 has 32 divisors (see below), whose sum is σ = 33331968. Its totient is φ = 12925440.

The previous prime is 22112201. The next prime is 22112213. The reversal of 22112211 is 11221122.

It is not a de Polignac number, because 22112211 - 2⁶ = 22112147 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22112213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161335 + ... + 161471.

It is an arithmetic number, because the mean of its divisors is an integer number (1041624).

Almost surely, 2^22112211 is an apocalyptic number.

22112211 is a deficient number, since it is larger than the sum of its proper divisors (11219757).

22112211 is a wasteful number, since it uses less digits than its factorization.

22112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291.

The product of its digits is 16, while the sum is 12.

The square root of 22112211 is about 4702.3622786850. The cubic root of 22112211 is about 280.6795187916.

Adding to 22112211 its reverse (11221122), we get a palindrome (33333333).

It can be divided in two parts, 221122 and 11, that multiplied together give a palindrome (2432342).

The spelling of 22112211 in words is "twenty-two million, one hundred twelve thousand, two hundred eleven".