117821227 has 2 divisors, whose sum is σ = 117821228. Its totient is φ = 117821226.

The previous prime is 117821213. The next prime is 117821251. The reversal of 117821227 is 722128711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117821227 - 2¹⁹ = 117296939 is a prime.

It is not a weakly prime, because it can be changed into another prime (117821257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58910613 + 58910614.

It is an arithmetic number, because the mean of its divisors is an integer number (58910614).

Almost surely, 2^117821227 is an apocalyptic number.

117821227 is a deficient number, since it is larger than the sum of its proper divisors (1).

117821227 is an equidigital number, since it uses as much as digits as its factorization.

117821227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 31.

The square root of 117821227 is about 10854.5486778585. The cubic root of 117821227 is about 490.2389879591.

Adding to 117821227 its reverse (722128711), we get a palindrome (839949938).

The spelling of 117821227 in words is "one hundred seventeen million, eight hundred twenty-one thousand, two hundred twenty-seven".