21214036421317 has 2 divisors, whose sum is σ = 21214036421318. Its totient is φ = 21214036421316.

The previous prime is 21214036421203. The next prime is 21214036421351. The reversal of 21214036421317 is 71312463041212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14671971820801 + 6542064600516 = 3830401^2 + 2557746^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214036421317 - 2⁷ = 21214036421189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214036421387) 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, 10607018210658 + 10607018210659.

It is an arithmetic number, because the mean of its divisors is an integer number (10607018210659).

Almost surely, 2^{21214036421317} is an apocalyptic number.

It is an amenable number.

21214036421317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214036421317 is an equidigital number, since it uses as much as digits as its factorization.

21214036421317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

Adding to 21214036421317 its reverse (71312463041212), we get a palindrome (92526499462529).

The spelling of 21214036421317 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, four hundred twenty-one thousand, three hundred seventeen".