212116223 has 4 divisors (see below), whose sum is σ = 231399528. Its totient is φ = 192832920.

The previous prime is 212116213. The next prime is 212116231. The reversal of 212116223 is 322611212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212116223 - 2¹⁶ = 212050687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212116195 and 212116204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212116213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9641636 + ... + 9641657.

It is an arithmetic number, because the mean of its divisors is an integer number (57849882).

Almost surely, 2^212116223 is an apocalyptic number.

212116223 is a deficient number, since it is larger than the sum of its proper divisors (19283305).

212116223 is a wasteful number, since it uses less digits than its factorization.

212116223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19283304.

The product of its digits is 288, while the sum is 20.

The square root of 212116223 is about 14564.2103459130. The cubic root of 212116223 is about 596.3821391697.

Adding to 212116223 its reverse (322611212), we get a palindrome (534727435).

The spelling of 212116223 in words is "two hundred twelve million, one hundred sixteen thousand, two hundred twenty-three".