21323030011 has 4 divisors (see below), whose sum is σ = 22577325912. Its totient is φ = 20068734112.

The previous prime is 21323029999. The next prime is 21323030021. The reversal of 21323030011 is 11003032312.

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 21323030011 - 2⁵ = 21323029979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21323030021) 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, 627147925 + ... + 627147958.

It is an arithmetic number, because the mean of its divisors is an integer number (5644331478).

Almost surely, 2^21323030011 is an apocalyptic number.

21323030011 is a deficient number, since it is larger than the sum of its proper divisors (1254295901).

21323030011 is a wasteful number, since it uses less digits than its factorization.

21323030011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254295900.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21323030011 its reverse (11003032312), we get a palindrome (32326062323).

The spelling of 21323030011 in words is "twenty-one billion, three hundred twenty-three million, thirty thousand, eleven".