21021020210227 has 2 divisors, whose sum is σ = 21021020210228. Its totient is φ = 21021020210226.

The previous prime is 21021020210221. The next prime is 21021020210257. The reversal of 21021020210227 is 72201202012012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21021020210227 - 2³ = 21021020210219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21021020210198 and 21021020210207.

It is not a weakly prime, because it can be changed into another prime (21021020210221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510510105113 + 10510510105114.

It is an arithmetic number, because the mean of its divisors is an integer number (10510510105114).

Almost surely, 2^{21021020210227} is an apocalyptic number.

21021020210227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021020210227 is an equidigital number, since it uses as much as digits as its factorization.

21021020210227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 21021020210227 its reverse (72201202012012), we get a palindrome (93222222222239).

The spelling of 21021020210227 in words is "twenty-one trillion, twenty-one billion, twenty million, two hundred ten thousand, two hundred twenty-seven".