21020021202227 has 2 divisors, whose sum is σ = 21020021202228. Its totient is φ = 21020021202226.

The previous prime is 21020021202223. The next prime is 21020021202247. The reversal of 21020021202227 is 72220212002012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21020021202227 - 2² = 21020021202223 is a prime.

It is a super-2 number, since 2×21020021202227² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21020021202223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510010601113 + 10510010601114.

It is an arithmetic number, because the mean of its divisors is an integer number (10510010601114).

Almost surely, 2^{21020021202227} is an apocalyptic number.

21020021202227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020021202227 is an equidigital number, since it uses as much as digits as its factorization.

21020021202227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 21020021202227 its reverse (72220212002012), we get a palindrome (93240233204239).

The spelling of 21020021202227 in words is "twenty-one trillion, twenty billion, twenty-one million, two hundred two thousand, two hundred twenty-seven".