21332440241 has 16 divisors (see below), whose sum is σ = 24706182144. Its totient is φ = 18041716224.

The previous prime is 21332440237. The next prime is 21332440253. The reversal of 21332440241 is 14204423312.

It is not a de Polignac number, because 21332440241 - 2² = 21332440237 is a prime.

It is a super-2 number, since 2×21332440241² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21332440241.

It is not an unprimeable number, because it can be changed into a prime (21332440211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115925 + ... + 236861.

It is an arithmetic number, because the mean of its divisors is an integer number (1544136384).

Almost surely, 2^21332440241 is an apocalyptic number.

It is an amenable number.

21332440241 is a deficient number, since it is larger than the sum of its proper divisors (3373741903).

21332440241 is a wasteful number, since it uses less digits than its factorization.

21332440241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121280.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21332440241 its reverse (14204423312), we get a palindrome (35536863553).

The spelling of 21332440241 in words is "twenty-one billion, three hundred thirty-two million, four hundred forty thousand, two hundred forty-one".