22221021212 has 24 divisors (see below), whose sum is σ = 41883670416. Its totient is φ = 10254486528.

The previous prime is 22221021191. The next prime is 22221021233. The reversal of 22221021212 is 21212012222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22221021191) and next prime (22221021233).

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, 436988 + ... + 485180.

It is an arithmetic number, because the mean of its divisors is an integer number (1745152934).

Almost surely, 2^22221021212 is an apocalyptic number.

It is an amenable number.

22221021212 is a deficient number, since it is larger than the sum of its proper divisors (19662649204).

22221021212 is a wasteful number, since it uses less digits than its factorization.

22221021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57077 (or 57075 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22221021212 its reverse (21212012222), we get a palindrome (43433033434).

The spelling of 22221021212 in words is "twenty-two billion, two hundred twenty-one million, twenty-one thousand, two hundred twelve".