20222221212 has 60 divisors (see below), whose sum is σ = 53388381816. Its totient is φ = 6673989600.

The previous prime is 20222221211. The next prime is 20222221273. The reversal of 20222221212 is 21212222202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 276258 + ... + 341705.

Almost surely, 2^20222221212 is an apocalyptic number.

It is an amenable number.

20222221212 is an abundant number, since it is smaller than the sum of its proper divisors (33166160604).

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

20222221212 is a wasteful number, since it uses less digits than its factorization.

20222221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618080 (or 618069 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20222221212 its reverse (21212222202), we get a palindrome (41434443414).

The spelling of 20222221212 in words is "twenty billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twelve".