212222291 has 2 divisors, whose sum is σ = 212222292. Its totient is φ = 212222290.

The previous prime is 212222189. The next prime is 212222303. The reversal of 212222291 is 192222212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212222291 - 2¹⁰ = 212221267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212252291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111145 + 106111146.

It is an arithmetic number, because the mean of its divisors is an integer number (106111146).

Almost surely, 2^212222291 is an apocalyptic number.

212222291 is a deficient number, since it is larger than the sum of its proper divisors (1).

212222291 is an equidigital number, since it uses as much as digits as its factorization.

212222291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 212222291 is about 14567.8512828763. The cubic root of 212222291 is about 596.4815288957.

The spelling of 212222291 in words is "two hundred twelve million, two hundred twenty-two thousand, two hundred ninety-one".