21033311030 has 64 divisors (see below), whose sum is σ = 42245867520. Its totient is φ = 7492953600.

The previous prime is 21033311029. The next prime is 21033311051. The reversal of 21033311030 is 3011333012.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3197645 + ... + 3204215.

It is an arithmetic number, because the mean of its divisors is an integer number (660091680).

Almost surely, 2^21033311030 is an apocalyptic number.

21033311030 is an abundant number, since it is smaller than the sum of its proper divisors (21212556490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21033311030 is a wasteful number, since it uses less digits than its factorization.

21033311030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21033311030 its reverse (3011333012), we get a palindrome (24044644042).

It can be divided in two parts, 2103 and 3311030, that added together give a palindrome (3313133).

The spelling of 21033311030 in words is "twenty-one billion, thirty-three million, three hundred eleven thousand, thirty".