21321304110 has 32 divisors (see below), whose sum is σ = 56856811680. Its totient is φ = 5685681024.

The previous prime is 21321304099. The next prime is 21321304111. The reversal of 21321304110 is 1140312312.

It is a super-2 number, since 2×21321304110² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321304111) 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, 39483627 + ... + 39484166.

It is an arithmetic number, because the mean of its divisors is an integer number (1776775365).

Almost surely, 2^21321304110 is an apocalyptic number.

21321304110 is an abundant number, since it is smaller than the sum of its proper divisors (35535507570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21321304110 is a wasteful number, since it uses less digits than its factorization.

21321304110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78967809 (or 78967803 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21321304110 its reverse (1140312312), we get a palindrome (22461616422).

The spelling of 21321304110 in words is "twenty-one billion, three hundred twenty-one million, three hundred four thousand, one hundred ten".