21323241011 has 2 divisors, whose sum is σ = 21323241012. Its totient is φ = 21323241010.

The previous prime is 21323240957. The next prime is 21323241029. The reversal of 21323241011 is 11014232312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21323241011 - 2¹⁸ = 21322978867 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21323241041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661620505 + 10661620506.

It is an arithmetic number, because the mean of its divisors is an integer number (10661620506).

Almost surely, 2^21323241011 is an apocalyptic number.

21323241011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323241011 is an equidigital number, since it uses as much as digits as its factorization.

21323241011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21323241011 its reverse (11014232312), we get a palindrome (32337473323).

The spelling of 21323241011 in words is "twenty-one billion, three hundred twenty-three million, two hundred forty-one thousand, eleven".