212232211 has 2 divisors, whose sum is σ = 212232212. Its totient is φ = 212232210.

The previous prime is 212232149. The next prime is 212232227. The reversal of 212232211 is 112232212.

It is a happy number.

It is an a-pointer prime, because the next prime (212232227) can be obtained adding 212232211 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212232211 - 2¹⁵ = 212199443 is a prime.

It is a super-2 number, since 2×212232211² = 90085022771897042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212232311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106116105 + 106116106.

It is an arithmetic number, because the mean of its divisors is an integer number (106116106).

Almost surely, 2^212232211 is an apocalyptic number.

212232211 is a deficient number, since it is larger than the sum of its proper divisors (1).

212232211 is an equidigital number, since it uses as much as digits as its factorization.

212232211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 16.

The square root of 212232211 is about 14568.1917546413. The cubic root of 212232211 is about 596.4908226172.

Adding to 212232211 its reverse (112232212), we get a palindrome (324464423).

Subtracting from 212232211 its reverse (112232212), we obtain a palindrome (99999999).

The spelling of 212232211 in words is "two hundred twelve million, two hundred thirty-two thousand, two hundred eleven".