21411301333 has 2 divisors, whose sum is σ = 21411301334. Its totient is φ = 21411301332.

The previous prime is 21411301319. The next prime is 21411301357. The reversal of 21411301333 is 33310311412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21375024804 + 36276529 = 146202^2 + 6023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21411301333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21411301393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705650666 + 10705650667.

It is an arithmetic number, because the mean of its divisors is an integer number (10705650667).

Almost surely, 2^21411301333 is an apocalyptic number.

It is an amenable number.

21411301333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411301333 is an equidigital number, since it uses as much as digits as its factorization.

21411301333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21411301333 its reverse (33310311412), we get a palindrome (54721612745).

The spelling of 21411301333 in words is "twenty-one billion, four hundred eleven million, three hundred one thousand, three hundred thirty-three".