21101100330 has 32 divisors (see below), whose sum is σ = 50683868928. Its totient is φ = 5622379200.

The previous prime is 21101100287. The next prime is 21101100413. The reversal of 21101100330 is 3300110112.

It is a super-2 number, since 2×21101100330² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248761 + ... + 322620.

It is an arithmetic number, because the mean of its divisors is an integer number (1583870904).

Almost surely, 2^21101100330 is an apocalyptic number.

21101100330 is an abundant number, since it is smaller than the sum of its proper divisors (29582768598).

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

21101100330 is a wasteful number, since it uses less digits than its factorization.

21101100330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572622.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21101100330 its reverse (3300110112), we get a palindrome (24401210442).

The spelling of 21101100330 in words is "twenty-one billion, one hundred one million, one hundred thousand, three hundred thirty".