21332443011 has 8 divisors (see below), whose sum is σ = 31029008064. Its totient is φ = 12928753320.

The previous prime is 21332443003. The next prime is 21332443043. The reversal of 21332443011 is 11034423312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21332443011 - 2³ = 21332443003 is a prime.

It is a super-2 number, since 2×21332443011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21332443711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323218801 + ... + 323218866.

It is an arithmetic number, because the mean of its divisors is an integer number (3878626008).

Almost surely, 2^21332443011 is an apocalyptic number.

21332443011 is a deficient number, since it is larger than the sum of its proper divisors (9696565053).

21332443011 is a wasteful number, since it uses less digits than its factorization.

21332443011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646437681.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21332443011 its reverse (11034423312), we get a palindrome (32366866323).

The spelling of 21332443011 in words is "twenty-one billion, three hundred thirty-two million, four hundred forty-three thousand, eleven".