21331023110 has 16 divisors (see below), whose sum is σ = 38398226256. Its totient is φ = 8531879328.

The previous prime is 21331023079. The next prime is 21331023127. The reversal of 21331023110 is 1132013312.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 130709 + ... + 244431.

It is an arithmetic number, because the mean of its divisors is an integer number (2399889141).

Almost surely, 2^21331023110 is an apocalyptic number.

21331023110 is a deficient number, since it is larger than the sum of its proper divisors (17067203146).

21331023110 is a wasteful number, since it uses less digits than its factorization.

21331023110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132487.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21331023110 its reverse (1132013312), we get a palindrome (22463036422).

The spelling of 21331023110 in words is "twenty-one billion, three hundred thirty-one million, twenty-three thousand, one hundred ten".