212213001222 has 64 divisors (see below), whose sum is σ = 478263764160. Its totient is φ = 69736660992.

The previous prime is 212213001181. The next prime is 212213001263. The reversal of 212213001222 is 222100312212.

212213001222 is a `hidden beast` number, since 21 + 221 + 300 + 122 + 2 = 666.

212213001222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212213001181) and next prime (212213001263).

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

It is a junction number, because it is equal to n+sod(n) for n = 212213001195 and 212213001204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9516678 + ... + 9538950.

It is an arithmetic number, because the mean of its divisors is an integer number (7472871315).

Almost surely, 2^212213001222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212213001222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239131882080).

212213001222 is an abundant number, since it is smaller than the sum of its proper divisors (266050762938).

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

212213001222 is a wasteful number, since it uses less digits than its factorization.

212213001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24774 (or 24768 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212213001222 its reverse (222100312212), we get a palindrome (434313313434).

The spelling of 212213001222 in words is "two hundred twelve billion, two hundred thirteen million, one thousand, two hundred twenty-two".