21103331110 has 32 divisors (see below), whose sum is σ = 38248646400. Its totient is φ = 8383126752.

The previous prime is 21103331101. The next prime is 21103331111. The reversal of 21103331110 is 1113330112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103331111) by changing a digit.

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, 1078837 + ... + 1098223.

It is an arithmetic number, because the mean of its divisors is an integer number (1195270200).

Almost surely, 2^21103331110 is an apocalyptic number.

21103331110 is a deficient number, since it is larger than the sum of its proper divisors (17145315290).

21103331110 is a wasteful number, since it uses less digits than its factorization.

21103331110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20140.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21103331110 its reverse (1113330112), we get a palindrome (22216661222).

The spelling of 21103331110 in words is "twenty-one billion, one hundred three million, three hundred thirty-one thousand, one hundred ten".