22012120212 has 96 divisors (see below), whose sum is σ = 54024727680. Its totient is φ = 6966435840.

The previous prime is 22012120133. The next prime is 22012120223. The reversal of 22012120212 is 21202121022.

It is a junction number, because it is equal to n+sod(n) for n = 22012120191 and 22012120200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5149308 + ... + 5153580.

It is an arithmetic number, because the mean of its divisors is an integer number (562757580).

Almost surely, 2^22012120212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22012120212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27012363840).

22012120212 is an abundant number, since it is smaller than the sum of its proper divisors (32012607468).

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

22012120212 is a wasteful number, since it uses less digits than its factorization.

22012120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4553 (or 4551 counting only the distinct ones).

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

Adding to 22012120212 its reverse (21202121022), we get a palindrome (43214241234).

The spelling of 22012120212 in words is "twenty-two billion, twelve million, one hundred twenty thousand, two hundred twelve".