21001110110 has 32 divisors (see below), whose sum is σ = 38618750592. Its totient is φ = 8219059200.

The previous prime is 21001110103. The next prime is 21001110131. The reversal of 21001110110 is 1101110012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2116160 + ... + 2126060.

It is an arithmetic number, because the mean of its divisors is an integer number (1206835956).

Almost surely, 2^21001110110 is an apocalyptic number.

21001110110 is a deficient number, since it is larger than the sum of its proper divisors (17617640482).

21001110110 is a wasteful number, since it uses less digits than its factorization.

21001110110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14468.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21001110110 its reverse (1101110012), we get a palindrome (22102220122).

The spelling of 21001110110 in words is "twenty-one billion, one million, one hundred ten thousand, one hundred ten".