21114433234421 has 2 divisors, whose sum is σ = 21114433234422. Its totient is φ = 21114433234420.

The previous prime is 21114433234339. The next prime is 21114433234441. The reversal of 21114433234421 is 12443233441112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20983957680625 + 130475553796 = 4580825^2 + 361214^2 .

It is a cyclic number.

It is not a de Polignac number, because 21114433234421 - 2²⁶ = 21114366125557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21114433234441) 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, 10557216617210 + 10557216617211.

It is an arithmetic number, because the mean of its divisors is an integer number (10557216617211).

Almost surely, 2^{21114433234421} is an apocalyptic number.

It is an amenable number.

21114433234421 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114433234421 is an equidigital number, since it uses as much as digits as its factorization.

21114433234421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 35.

Adding to 21114433234421 its reverse (12443233441112), we get a palindrome (33557666675533).

The spelling of 21114433234421 in words is "twenty-one trillion, one hundred fourteen billion, four hundred thirty-three million, two hundred thirty-four thousand, four hundred twenty-one".