22112121212 has 6 divisors (see below), whose sum is σ = 38696212128. Its totient is φ = 11056060604.

The previous prime is 22112121203. The next prime is 22112121233. The reversal of 22112121212 is 21212121122.

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

22112121212 is a modest number, since divided by 121212 gives 22112 as remainder.

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 as a sum of consecutive naturals, namely, 2764015148 + ... + 2764015155.

It is an arithmetic number, because the mean of its divisors is an integer number (6449368688).

Almost surely, 2^22112121212 is an apocalyptic number.

It is an amenable number.

22112121212 is a deficient number, since it is larger than the sum of its proper divisors (16584090916).

22112121212 is a wasteful number, since it uses less digits than its factorization.

22112121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5528030307 (or 5528030305 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

Adding to 22112121212 its reverse (21212121122), we get a palindrome (43324242334).

The spelling of 22112121212 in words is "twenty-two billion, one hundred twelve million, one hundred twenty-one thousand, two hundred twelve".