912221227 has 2 divisors, whose sum is σ = 912221228. Its totient is φ = 912221226.

The previous prime is 912221203. The next prime is 912221237. The reversal of 912221227 is 722122219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 912221227 - 2⁷ = 912221099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 912221195 and 912221204.

It is not a weakly prime, because it can be changed into another prime (912221237) 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, 456110613 + 456110614.

It is an arithmetic number, because the mean of its divisors is an integer number (456110614).

Almost surely, 2^912221227 is an apocalyptic number.

912221227 is a deficient number, since it is larger than the sum of its proper divisors (1).

912221227 is an equidigital number, since it uses as much as digits as its factorization.

912221227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 912221227 is about 30203.0002979836. Note that the first 3 decimals coincide. The cubic root of 912221227 is about 969.8399236323.

The spelling of 912221227 in words is "nine hundred twelve million, two hundred twenty-one thousand, two hundred twenty-seven".