21330441011 has 4 divisors (see below), whose sum is σ = 23269572024. Its totient is φ = 19391310000.

The previous prime is 21330441007. The next prime is 21330441043. The reversal of 21330441011 is 11014403312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21330441011 - 2² = 21330441007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330441001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969565490 + ... + 969565511.

It is an arithmetic number, because the mean of its divisors is an integer number (5817393006).

Almost surely, 2^21330441011 is an apocalyptic number.

21330441011 is a deficient number, since it is larger than the sum of its proper divisors (1939131013).

21330441011 is a wasteful number, since it uses less digits than its factorization.

21330441011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939131012.

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

Adding to 21330441011 its reverse (11014403312), we get a palindrome (32344844323).

The spelling of 21330441011 in words is "twenty-one billion, three hundred thirty million, four hundred forty-one thousand, eleven".