21201311110 has 32 divisors (see below), whose sum is σ = 43623383040. Its totient is φ = 7267478112.

The previous prime is 21201311107. The next prime is 21201311113. The reversal of 21201311110 is 1111310212.

It is a happy number.

21201311110 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (21201311107) and next prime (21201311113).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201311113) 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, 328747 + ... + 387913.

It is an arithmetic number, because the mean of its divisors is an integer number (1363230720).

Almost surely, 2^21201311110 is an apocalyptic number.

21201311110 is an abundant number, since it is smaller than the sum of its proper divisors (22422071930).

21201311110 is a wasteful number, since it uses less digits than its factorization.

21201311110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64300.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21201311110 its reverse (1111310212), we get a palindrome (22312621322).

The spelling of 21201311110 in words is "twenty-one billion, two hundred one million, three hundred eleven thousand, one hundred ten".