21331211110 has 32 divisors (see below), whose sum is σ = 42301484064. Its totient is φ = 7680000000.

The previous prime is 21331211071. The next prime is 21331211113. The reversal of 21331211110 is 1111213312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331211113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 948891 + ... + 971110.

It is an arithmetic number, because the mean of its divisors is an integer number (1321921377).

Almost surely, 2^21331211110 is an apocalyptic number.

21331211110 is a deficient number, since it is larger than the sum of its proper divisors (20970272954).

21331211110 is a wasteful number, since it uses less digits than its factorization.

21331211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920120.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21331211110 its reverse (1111213312), we get a palindrome (22442424422).

It can be divided in two parts, 213312 and 11110, that added together give a palindrome (224422).

The spelling of 21331211110 in words is "twenty-one billion, three hundred thirty-one million, two hundred eleven thousand, one hundred ten".