21524240011 has 2 divisors, whose sum is σ = 21524240012. Its totient is φ = 21524240010.

The previous prime is 21524239969. The next prime is 21524240027. The reversal of 21524240011 is 11004242512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21524240011 - 2¹¹ = 21524237963 is a prime.

It is a super-2 number, since 2×21524240011² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21528240011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10762120005 + 10762120006.

It is an arithmetic number, because the mean of its divisors is an integer number (10762120006).

Almost surely, 2^21524240011 is an apocalyptic number.

21524240011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21524240011 is an equidigital number, since it uses as much as digits as its factorization.

21524240011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 21524240011 its reverse (11004242512), we get a palindrome (32528482523).

The spelling of 21524240011 in words is "twenty-one billion, five hundred twenty-four million, two hundred forty thousand, eleven".