21220002091027 has 2 divisors, whose sum is σ = 21220002091028. Its totient is φ = 21220002091026.

The previous prime is 21220002091019. The next prime is 21220002091111. The reversal of 21220002091027 is 72019020002212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21220002091027 - 2³ = 21220002091019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21220002090986 and 21220002091004.

It is not a weakly prime, because it can be changed into another prime (21220002091927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610001045513 + 10610001045514.

It is an arithmetic number, because the mean of its divisors is an integer number (10610001045514).

Almost surely, 2^{21220002091027} is an apocalyptic number.

21220002091027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220002091027 is an equidigital number, since it uses as much as digits as its factorization.

21220002091027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 21220002091027 its reverse (72019020002212), we get a palindrome (93239022093239).

The spelling of 21220002091027 in words is "twenty-one trillion, two hundred twenty billion, two million, ninety-one thousand, twenty-seven".