211222147 has 2 divisors, whose sum is σ = 211222148. Its totient is φ = 211222146.

The previous prime is 211222111. The next prime is 211222157. The reversal of 211222147 is 741222112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211222147 - 2⁷ = 211222019 is a prime.

It is a super-2 number, since 2×211222147² = 89229590766579218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211222157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611073 + 105611074.

It is an arithmetic number, because the mean of its divisors is an integer number (105611074).

Almost surely, 2^211222147 is an apocalyptic number.

211222147 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222147 is an equidigital number, since it uses as much as digits as its factorization.

211222147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 22.

The square root of 211222147 is about 14533.4836498343. The cubic root of 211222147 is about 595.5430364745.

Adding to 211222147 its reverse (741222112), we get a palindrome (952444259).

The spelling of 211222147 in words is "two hundred eleven million, two hundred twenty-two thousand, one hundred forty-seven".