21344413232213 has 2 divisors, whose sum is σ = 21344413232214. Its totient is φ = 21344413232212.

The previous prime is 21344413232189. The next prime is 21344413232273. The reversal of 21344413232213 is 31223231444312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20563340841124 + 781072391089 = 4534682^2 + 883783^2 .

It is a cyclic number.

It is not a de Polignac number, because 21344413232213 - 2¹⁰ = 21344413231189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21344413232273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672206616106 + 10672206616107.

It is an arithmetic number, because the mean of its divisors is an integer number (10672206616107).

Almost surely, 2^{21344413232213} is an apocalyptic number.

It is an amenable number.

21344413232213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344413232213 is an equidigital number, since it uses as much as digits as its factorization.

21344413232213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 35.

Adding to 21344413232213 its reverse (31223231444312), we get a palindrome (52567644676525).

The spelling of 21344413232213 in words is "twenty-one trillion, three hundred forty-four billion, four hundred thirteen million, two hundred thirty-two thousand, two hundred thirteen".