229121911 has 2 divisors, whose sum is σ = 229121912. Its totient is φ = 229121910.

The previous prime is 229121909. The next prime is 229121933. The reversal of 229121911 is 119121922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229121911 - 2¹ = 229121909 is a prime.

Together with 229121909, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 229121911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229121941) 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, 114560955 + 114560956.

It is an arithmetic number, because the mean of its divisors is an integer number (114560956).

Almost surely, 2^229121911 is an apocalyptic number.

229121911 is a deficient number, since it is larger than the sum of its proper divisors (1).

229121911 is an equidigital number, since it uses as much as digits as its factorization.

229121911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 28.

The square root of 229121911 is about 15136.7734672882. The cubic root of 229121911 is about 611.9118650404.

It can be divided in two parts, 229121 and 911, that added together give a palindrome (230032).

The spelling of 229121911 in words is "two hundred twenty-nine million, one hundred twenty-one thousand, nine hundred eleven".