21314201424521 has 2 divisors, whose sum is σ = 21314201424522. Its totient is φ = 21314201424520.

The previous prime is 21314201424493. The next prime is 21314201424533. The reversal of 21314201424521 is 12542410241312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15005745375625 + 6308456048896 = 3873725^2 + 2511664^2 .

It is a cyclic number.

It is not a de Polignac number, because 21314201424521 - 2¹⁰ = 21314201423497 is a prime.

It is not a weakly prime, because it can be changed into another prime (21314201424721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10657100712260 + 10657100712261.

It is an arithmetic number, because the mean of its divisors is an integer number (10657100712261).

Almost surely, 2^{21314201424521} is an apocalyptic number.

It is an amenable number.

21314201424521 is a deficient number, since it is larger than the sum of its proper divisors (1).

21314201424521 is an equidigital number, since it uses as much as digits as its factorization.

21314201424521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 21314201424521 its reverse (12542410241312), we get a palindrome (33856611665833).

The spelling of 21314201424521 in words is "twenty-one trillion, three hundred fourteen billion, two hundred one million, four hundred twenty-four thousand, five hundred twenty-one".