22012021212 has 24 divisors (see below), whose sum is σ = 51367955856. Its totient is φ = 7336401408.

The previous prime is 22012021211. The next prime is 22012021259. The reversal of 22012021212 is 21212021022.

It is a junction number, because it is equal to n+sod(n) for n = 22012021191 and 22012021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16213 + ... + 210444.

It is an arithmetic number, because the mean of its divisors is an integer number (2140331494).

Almost surely, 2^22012021212 is an apocalyptic number.

It is an amenable number.

22012021212 is an abundant number, since it is smaller than the sum of its proper divisors (29355934644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22012021212 is a wasteful number, since it uses less digits than its factorization.

22012021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234757 (or 234755 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22012021212 its reverse (21212021022), we get a palindrome (43224042234).

The spelling of 22012021212 in words is "twenty-two billion, twelve million, twenty-one thousand, two hundred twelve".