21414322341421 has 2 divisors, whose sum is σ = 21414322341422. Its totient is φ = 21414322341420.

The previous prime is 21414322341409. The next prime is 21414322341431. The reversal of 21414322341421 is 12414322341412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15678321291396 + 5736001050025 = 3959586^2 + 2394995^2 .

It is a cyclic number.

It is not a de Polignac number, because 21414322341421 - 2¹⁷ = 21414322210349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21414322341431) 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, 10707161170710 + 10707161170711.

It is an arithmetic number, because the mean of its divisors is an integer number (10707161170711).

Almost surely, 2^{21414322341421} is an apocalyptic number.

It is an amenable number.

21414322341421 is a deficient number, since it is larger than the sum of its proper divisors (1).

21414322341421 is an equidigital number, since it uses as much as digits as its factorization.

21414322341421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 34.

Adding to 21414322341421 its reverse (12414322341412), we get a palindrome (33828644682833).

Subtracting from 21414322341421 its reverse (12414322341412), we obtain a palindrome (9000000000009).

The spelling of 21414322341421 in words is "twenty-one trillion, four hundred fourteen billion, three hundred twenty-two million, three hundred forty-one thousand, four hundred twenty-one".