22210021212 has 96 divisors (see below), whose sum is σ = 56131693632. Its totient is φ = 6808928256.

The previous prime is 22210021199. The next prime is 22210021219. The reversal of 22210021212 is 21212001222.

It is a junction number, because it is equal to n+sod(n) for n = 22210021191 and 22210021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2774688 + ... + 2782680.

It is an arithmetic number, because the mean of its divisors is an integer number (584705142).

Almost surely, 2^22210021212 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 22210021212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28065846816).

22210021212 is an abundant number, since it is smaller than the sum of its proper divisors (33921672420).

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

22210021212 is a wasteful number, since it uses less digits than its factorization.

22210021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327 (or 8325 counting only the distinct ones).

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

Adding to 22210021212 its reverse (21212001222), we get a palindrome (43422022434).

The spelling of 22210021212 in words is "twenty-two billion, two hundred ten million, twenty-one thousand, two hundred twelve".