21010211227 has 2 divisors, whose sum is σ = 21010211228. Its totient is φ = 21010211226.

The previous prime is 21010211197. The next prime is 21010211231. The reversal of 21010211227 is 72211201012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21010211227 - 2¹⁵ = 21010178459 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010211297) 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, 10505105613 + 10505105614.

It is an arithmetic number, because the mean of its divisors is an integer number (10505105614).

Almost surely, 2^21010211227 is an apocalyptic number.

21010211227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010211227 is an equidigital number, since it uses as much as digits as its factorization.

21010211227 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.

Adding to 21010211227 its reverse (72211201012), we get a palindrome (93221412239).

The spelling of 21010211227 in words is "twenty-one billion, ten million, two hundred eleven thousand, two hundred twenty-seven".