212100222 has 16 divisors (see below), whose sum is σ = 424509840. Its totient is φ = 70648512.

The previous prime is 212100193. The next prime is 212100241. The reversal of 212100222 is 222001212.

212100222 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 212100198 and 212100207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3447 + ... + 20882.

It is an arithmetic number, because the mean of its divisors is an integer number (26531865).

Almost surely, 2^212100222 is an apocalyptic number.

212100222 is an abundant number, since it is smaller than the sum of its proper divisors (212409618).

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

212100222 is a wasteful number, since it uses less digits than its factorization.

212100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25787.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 212100222 is about 14563.6610095127. The cubic root of 212100222 is about 596.3671427518.

Adding to 212100222 its reverse (222001212), we get a palindrome (434101434).

The spelling of 212100222 in words is "two hundred twelve million, one hundred thousand, two hundred twenty-two".