212211193 has 2 divisors, whose sum is σ = 212211194. Its totient is φ = 212211192.

The previous prime is 212211191. The next prime is 212211269. The reversal of 212211193 is 391112212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211615209 + 595984 = 14547^2 + 772^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211193 - 2¹ = 212211191 is a prime.

Together with 212211191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212211191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105596 + 106105597.

It is an arithmetic number, because the mean of its divisors is an integer number (106105597).

Almost surely, 2^212211193 is an apocalyptic number.

It is an amenable number.

212211193 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211193 is an equidigital number, since it uses as much as digits as its factorization.

212211193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 212211193 is about 14567.4703706580. The cubic root of 212211193 is about 596.4711312016.

The spelling of 212211193 in words is "two hundred twelve million, two hundred eleven thousand, one hundred ninety-three".