21422200214021 has 2 divisors, whose sum is σ = 21422200214022. Its totient is φ = 21422200214020.

The previous prime is 21422200214017. The next prime is 21422200214111. The reversal of 21422200214021 is 12041200222412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17117135445796 + 4305064768225 = 4137286^2 + 2074865^2 .

It is a cyclic number.

It is not a de Polignac number, because 21422200214021 - 2² = 21422200214017 is a prime.

It is a super-4 number, since 4×21422200214021⁴ (a number of 54 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21422200214221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711100107010 + 10711100107011.

It is an arithmetic number, because the mean of its divisors is an integer number (10711100107011).

Almost surely, 2^{21422200214021} is an apocalyptic number.

It is an amenable number.

21422200214021 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422200214021 is an equidigital number, since it uses as much as digits as its factorization.

21422200214021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21422200214021 its reverse (12041200222412), we get a palindrome (33463400436433).

The spelling of 21422200214021 in words is "twenty-one trillion, four hundred twenty-two billion, two hundred million, two hundred fourteen thousand, twenty-one".