22220121212 has 6 divisors (see below), whose sum is σ = 38885212128. Its totient is φ = 11110060604.

The previous prime is 22220121179. The next prime is 22220121227. The reversal of 22220121212 is 21212102222.

It is a happy number.

22220121212 is a modest number, since divided by 121212 gives 22220 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777515148 + ... + 2777515155.

It is an arithmetic number, because the mean of its divisors is an integer number (6480868688).

Almost surely, 2^22220121212 is an apocalyptic number.

It is an amenable number.

22220121212 is a deficient number, since it is larger than the sum of its proper divisors (16665090916).

22220121212 is a wasteful number, since it uses less digits than its factorization.

22220121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555030307 (or 5555030305 counting only the distinct ones).

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

Adding to 22220121212 its reverse (21212102222), we get a palindrome (43432223434).

The spelling of 22220121212 in words is "twenty-two billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twelve".