22221212222 has 24 divisors (see below), whose sum is σ = 36811175016. Its totient is φ = 10052658000.

The previous prime is 22221212201. The next prime is 22221212231.

22221212222 is nontrivially palindromic in base 10.

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 = 22221212194 and 22221212203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166529 + ... + 268652.

It is an arithmetic number, because the mean of its divisors is an integer number (1533798959).

Almost surely, 2^22221212222 is an apocalyptic number.

22221212222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22221212222 is a deficient number, since it is larger than the sum of its proper divisors (14589962794).

22221212222 is a wasteful number, since it uses less digits than its factorization.

22221212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435416 (or 435405 counting only the distinct ones).

The product of its digits is 512, while the sum is 20.

The spelling of 22221212222 in words is "twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".