21102220221227 has 2 divisors, whose sum is σ = 21102220221228. Its totient is φ = 21102220221226.

The previous prime is 21102220221217. The next prime is 21102220221233. The reversal of 21102220221227 is 72212202220112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102220221227 - 2⁸ = 21102220220971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21102220221196 and 21102220221205.

It is not a weakly prime, because it can be changed into another prime (21102220221217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551110110613 + 10551110110614.

It is an arithmetic number, because the mean of its divisors is an integer number (10551110110614).

Almost surely, 2^{21102220221227} is an apocalyptic number.

21102220221227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102220221227 is an equidigital number, since it uses as much as digits as its factorization.

21102220221227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 26.

Adding to 21102220221227 its reverse (72212202220112), we get a palindrome (93314422441339).

The spelling of 21102220221227 in words is "twenty-one trillion, one hundred two billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-seven".