212100201021222 has 40 divisors (see below), whose sum is σ = 475573618280376. Its totient is φ = 70653645344448.

The previous prime is 212100201021217. The next prime is 212100201021229. The reversal of 212100201021222 is 222120102001212.

It is a happy number.

212100201021222 is a `hidden beast` number, since 21 + 210 + 0 + 201 + 0 + 212 + 22 = 666.

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 = 212100201021195 and 212100201021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100201021229) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 429582723 + ... + 430076174.

Almost surely, 2^{212100201021222} is an apocalyptic number.

212100201021222 is an abundant number, since it is smaller than the sum of its proper divisors (263473417259154).

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

212100201021222 is a wasteful number, since it uses less digits than its factorization.

212100201021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859660434 (or 859660425 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212100201021222 its reverse (222120102001212), we get a palindrome (434220303022434).

The spelling of 212100201021222 in words is "two hundred twelve trillion, one hundred billion, two hundred one million, twenty-one thousand, two hundred twenty-two".