221034211 has 2 divisors, whose sum is σ = 221034212. Its totient is φ = 221034210.

The previous prime is 221034137. The next prime is 221034223. The reversal of 221034211 is 112430122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221034211 - 2⁷ = 221034083 is a prime.

It is a super-2 number, since 2×221034211² = 97712244864785042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221034271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110517105 + 110517106.

It is an arithmetic number, because the mean of its divisors is an integer number (110517106).

Almost surely, 2^221034211 is an apocalyptic number.

221034211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221034211 is an equidigital number, since it uses as much as digits as its factorization.

221034211 is an evil number, because the sum of its binary digits is even.

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

The square root of 221034211 is about 14867.2193432397. The cubic root of 221034211 is about 604.6255552429.

Adding to 221034211 its reverse (112430122), we get a palindrome (333464333).

The spelling of 221034211 in words is "two hundred twenty-one million, thirty-four thousand, two hundred eleven".