21221002122227 has 2 divisors, whose sum is σ = 21221002122228. Its totient is φ = 21221002122226.

The previous prime is 21221002122217. The next prime is 21221002122251. The reversal of 21221002122227 is 72222120012212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221002122227 - 2¹⁰ = 21221002121203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21221002122196 and 21221002122205.

It is not a weakly prime, because it can be changed into another prime (21221002122217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610501061113 + 10610501061114.

It is an arithmetic number, because the mean of its divisors is an integer number (10610501061114).

Almost surely, 2^{21221002122227} is an apocalyptic number.

21221002122227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221002122227 is an equidigital number, since it uses as much as digits as its factorization.

21221002122227 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 21221002122227 its reverse (72222120012212), we get a palindrome (93443122134439).

The spelling of 21221002122227 in words is "twenty-one trillion, two hundred twenty-one billion, two million, one hundred twenty-two thousand, two hundred twenty-seven".