22122212 has 48 divisors (see below), whose sum is σ = 45749760. Its totient is φ = 9165312.

The previous prime is 22122203. The next prime is 22122223. The reversal of 22122212 is 21222122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161408 + ... + 161544.

It is an arithmetic number, because the mean of its divisors is an integer number (953120).

Almost surely, 2^22122212 is an apocalyptic number.

It is an amenable number.

22122212 is an abundant number, since it is smaller than the sum of its proper divisors (23627548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22122212 is a wasteful number, since it uses less digits than its factorization.

22122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 298 counting only the distinct ones).

The product of its digits is 64, while the sum is 14.

The square root of 22122212 is about 4703.4255601636. The cubic root of 22122212 is about 280.7218280353.

Adding to 22122212 its reverse (21222122), we get a palindrome (43344334).

It can be divided in two parts, 22122 and 212, that multiplied together give a palindrome (4689864).

The spelling of 22122212 in words is "twenty-two million, one hundred twenty-two thousand, two hundred twelve".