212221222002 has 48 divisors (see below), whose sum is σ = 462189798720. Its totient is φ = 70374981600.

The previous prime is 212221221991. The next prime is 212221222007. The reversal of 212221222002 is 200222122212.

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

It is not an unprimeable number, because it can be changed into a prime (212221222007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9943899 + ... + 9965217.

It is an arithmetic number, because the mean of its divisors is an integer number (9628954140).

Almost surely, 2^212221222002 is an apocalyptic number.

212221222002 is an abundant number, since it is smaller than the sum of its proper divisors (249968576718).

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

212221222002 is a wasteful number, since it uses less digits than its factorization.

212221222002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24159 (or 24156 counting only the distinct ones).

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

Adding to 212221222002 its reverse (200222122212), we get a palindrome (412443344214).

The spelling of 212221222002 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, two".