212109222 has 16 divisors (see below), whose sum is σ = 456850800. Its totient is φ = 65264352.

The previous prime is 212109211. The next prime is 212109241. The reversal of 212109222 is 222901212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359597 + ... + 1359752.

It is an arithmetic number, because the mean of its divisors is an integer number (28553175).

Almost surely, 2^212109222 is an apocalyptic number.

212109222 is an abundant number, since it is smaller than the sum of its proper divisors (244741578).

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

212109222 is a wasteful number, since it uses less digits than its factorization.

212109222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2719367.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 212109222 is about 14563.9699944761. The cubic root of 212109222 is about 596.3755778025.

The spelling of 212109222 in words is "two hundred twelve million, one hundred nine thousand, two hundred twenty-two".