212203291 has 2 divisors, whose sum is σ = 212203292. Its totient is φ = 212203290.

The previous prime is 212203289. The next prime is 212203297. The reversal of 212203291 is 192302212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212203291 - 2¹ = 212203289 is a prime.

It is a super-2 number, since 2×212203291² = 90060473422461362, which contains 22 as substring.

Together with 212203289, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212203297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106101645 + 106101646.

It is an arithmetic number, because the mean of its divisors is an integer number (106101646).

Almost surely, 2^212203291 is an apocalyptic number.

212203291 is a deficient number, since it is larger than the sum of its proper divisors (1).

212203291 is an equidigital number, since it uses as much as digits as its factorization.

212203291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 212203291 is about 14567.1991473996. The cubic root of 212203291 is about 596.4637276126.

The spelling of 212203291 in words is "two hundred twelve million, two hundred three thousand, two hundred ninety-one".