212242211 has 2 divisors, whose sum is σ = 212242212. Its totient is φ = 212242210.

The previous prime is 212242207. The next prime is 212242223. The reversal of 212242211 is 112242212.

212242211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212242211 - 2² = 212242207 is a prime.

It is a super-2 number, since 2×212242211² = 90093512260337042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212242211.

It is not a weakly prime, because it can be changed into another prime (212242201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106121105 + 106121106.

It is an arithmetic number, because the mean of its divisors is an integer number (106121106).

Almost surely, 2^212242211 is an apocalyptic number.

212242211 is a deficient number, since it is larger than the sum of its proper divisors (1).

212242211 is an equidigital number, since it uses as much as digits as its factorization.

212242211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 17.

The square root of 212242211 is about 14568.5349640930. The cubic root of 212242211 is about 596.5001909949.

Adding to 212242211 its reverse (112242212), we get a palindrome (324484423).

Subtracting from 212242211 its reverse (112242212), we obtain a palindrome (99999999).

The spelling of 212242211 in words is "two hundred twelve million, two hundred forty-two thousand, two hundred eleven".