221101147 has 2 divisors, whose sum is σ = 221101148. Its totient is φ = 221101146.

The previous prime is 221101129. The next prime is 221101163. The reversal of 221101147 is 741101122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221101147 - 2¹⁹ = 220576859 is a prime.

It is not a weakly prime, because it can be changed into another prime (221101117) 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, 110550573 + 110550574.

It is an arithmetic number, because the mean of its divisors is an integer number (110550574).

Almost surely, 2^221101147 is an apocalyptic number.

221101147 is a deficient number, since it is larger than the sum of its proper divisors (1).

221101147 is an equidigital number, since it uses as much as digits as its factorization.

221101147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 221101147 is about 14869.4702999132. The cubic root of 221101147 is about 604.6865821934.

Adding to 221101147 its reverse (741101122), we get a palindrome (962202269).

The spelling of 221101147 in words is "two hundred twenty-one million, one hundred one thousand, one hundred forty-seven".