212242223 has 2 divisors, whose sum is σ = 212242224. Its totient is φ = 212242222.

The previous prime is 212242211. The next prime is 212242231. The reversal of 212242223 is 322242212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212242223 - 2⁴ = 212242207 is a prime.

It is a super-2 number, since 2×212242223² = 90093522447963458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212242195 and 212242204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212242253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106121111 + 106121112.

It is an arithmetic number, because the mean of its divisors is an integer number (106121112).

Almost surely, 2^212242223 is an apocalyptic number.

212242223 is a deficient number, since it is larger than the sum of its proper divisors (1).

212242223 is an equidigital number, since it uses as much as digits as its factorization.

212242223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 20.

The square root of 212242223 is about 14568.5353759395. The cubic root of 212242223 is about 596.5002022367.

Adding to 212242223 its reverse (322242212), we get a palindrome (534484435).

The spelling of 212242223 in words is "two hundred twelve million, two hundred forty-two thousand, two hundred twenty-three".