21002102442227 has 2 divisors, whose sum is σ = 21002102442228. Its totient is φ = 21002102442226.

The previous prime is 21002102442221. The next prime is 21002102442229. The reversal of 21002102442227 is 72224420120012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002102442227 - 2²⁸ = 21001834006771 is a prime.

Together with 21002102442229, 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 21002102442227.

It is not a weakly prime, because it can be changed into another prime (21002102442221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501051221113 + 10501051221114.

It is an arithmetic number, because the mean of its divisors is an integer number (10501051221114).

Almost surely, 2^{21002102442227} is an apocalyptic number.

21002102442227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002102442227 is an equidigital number, since it uses as much as digits as its factorization.

21002102442227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 29.

Adding to 21002102442227 its reverse (72224420120012), we get a palindrome (93226522562239).

The spelling of 21002102442227 in words is "twenty-one trillion, two billion, one hundred two million, four hundred forty-two thousand, two hundred twenty-seven".