21033130011 has 32 divisors (see below), whose sum is σ = 29276432640. Its totient is φ = 13419993600.

The previous prime is 21033130009. The next prime is 21033130021. The reversal of 21033130011 is 11003133012.

It is not a de Polignac number, because 21033130011 - 2¹ = 21033130009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033130021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3778116 + ... + 3783678.

It is an arithmetic number, because the mean of its divisors is an integer number (914888520).

Almost surely, 2^21033130011 is an apocalyptic number.

21033130011 is a deficient number, since it is larger than the sum of its proper divisors (8243302629).

21033130011 is a wasteful number, since it uses less digits than its factorization.

21033130011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21033130011 its reverse (11003133012), we get a palindrome (32036263023).

The spelling of 21033130011 in words is "twenty-one billion, thirty-three million, one hundred thirty thousand, eleven".