21213543315301 has 2 divisors, whose sum is σ = 21213543315302. Its totient is φ = 21213543315300.

The previous prime is 21213543315259. The next prime is 21213543315319. The reversal of 21213543315301 is 10351334531212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12354592308100 + 8858951007201 = 3514910^2 + 2976399^2 .

It is a cyclic number.

It is not a de Polignac number, because 21213543315301 - 2¹¹ = 21213543313253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213543315331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606771657650 + 10606771657651.

It is an arithmetic number, because the mean of its divisors is an integer number (10606771657651).

Almost surely, 2^{21213543315301} is an apocalyptic number.

It is an amenable number.

21213543315301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213543315301 is an equidigital number, since it uses as much as digits as its factorization.

21213543315301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 21213543315301 its reverse (10351334531212), we get a palindrome (31564877846513).

The spelling of 21213543315301 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, three hundred one".