21210065110 has 16 divisors (see below), whose sum is σ = 41114895696. Its totient is φ = 7831408608.

The previous prime is 21210065059. The next prime is 21210065117. The reversal of 21210065110 is 1156001212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210065117) 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 7 ways as a sum of consecutive naturals, for example, 81577044 + ... + 81577303.

It is an arithmetic number, because the mean of its divisors is an integer number (2569680981).

Almost surely, 2^21210065110 is an apocalyptic number.

21210065110 is a deficient number, since it is larger than the sum of its proper divisors (19904830586).

21210065110 is a wasteful number, since it uses less digits than its factorization.

21210065110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163154367.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 21210065110 its reverse (1156001212), we get a palindrome (22366066322).

The spelling of 21210065110 in words is "twenty-one billion, two hundred ten million, sixty-five thousand, one hundred ten".