21411241130021 has 2 divisors, whose sum is σ = 21411241130022. Its totient is φ = 21411241130020.

The previous prime is 21411241130003. The next prime is 21411241130051. The reversal of 21411241130021 is 12003114211412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12437711637796 + 8973529492225 = 3526714^2 + 2995585^2 .

It is a cyclic number.

It is not a de Polignac number, because 21411241130021 - 2¹⁴ = 21411241113637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21411241130051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705620565010 + 10705620565011.

It is an arithmetic number, because the mean of its divisors is an integer number (10705620565011).

Almost surely, 2^{21411241130021} is an apocalyptic number.

It is an amenable number.

21411241130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411241130021 is an equidigital number, since it uses as much as digits as its factorization.

21411241130021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 21411241130021 its reverse (12003114211412), we get a palindrome (33414355341433).

The spelling of 21411241130021 in words is "twenty-one trillion, four hundred eleven billion, two hundred forty-one million, one hundred thirty thousand, twenty-one".