21313013333 has 2 divisors, whose sum is σ = 21313013334. Its totient is φ = 21313013332.

The previous prime is 21313013327. The next prime is 21313013347. The reversal of 21313013333 is 33331031312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20252989969 + 1060023364 = 142313^2 + 32558^2 .

It is a cyclic number.

It is not a de Polignac number, because 21313013333 - 2²⁰ = 21311964757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21313013299 and 21313013308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313013383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656506666 + 10656506667.

It is an arithmetic number, because the mean of its divisors is an integer number (10656506667).

Almost surely, 2^21313013333 is an apocalyptic number.

It is an amenable number.

21313013333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313013333 is an equidigital number, since it uses as much as digits as its factorization.

21313013333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 21313013333 its reverse (33331031312), we get a palindrome (54644044645).

The spelling of 21313013333 in words is "twenty-one billion, three hundred thirteen million, thirteen thousand, three hundred thirty-three".