22121222 has 16 divisors (see below), whose sum is σ = 34340544. Its totient is φ = 10680000.

The previous prime is 22121213. The next prime is 22121293. The reversal of 22121222 is 22212122.

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

It is a junction number, because it is equal to n+sod(n) for n = 22121197 and 22121206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6947 + ... + 9617.

It is an arithmetic number, because the mean of its divisors is an integer number (2146284).

Almost surely, 2^22121222 is an apocalyptic number.

22121222 is a deficient number, since it is larger than the sum of its proper divisors (12219322).

22121222 is a wasteful number, since it uses less digits than its factorization.

22121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815.

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

The square root of 22121222 is about 4703.3203165423. The cubic root of 22121222 is about 280.7176404077.

Adding to 22121222 its reverse (22212122), we get a palindrome (44333344).

It can be divided in two parts, 2212122 and 2, that multiplied together give a palindrome (4424244).

The spelling of 22121222 in words is "twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".