21212300110 has 16 divisors (see below), whose sum is σ = 38520037296. Its totient is φ = 8409831808.

The previous prime is 21212300101. The next prime is 21212300111. The reversal of 21212300110 is 1100321212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212300111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9384844 + ... + 9387103.

It is an arithmetic number, because the mean of its divisors is an integer number (2407502331).

Almost surely, 2^21212300110 is an apocalyptic number.

21212300110 is a deficient number, since it is larger than the sum of its proper divisors (17307737186).

21212300110 is a wasteful number, since it uses less digits than its factorization.

21212300110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18772067.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21212300110 its reverse (1100321212), we get a palindrome (22312621322).

The spelling of 21212300110 in words is "twenty-one billion, two hundred twelve million, three hundred thousand, one hundred ten".