21022204110 has 64 divisors (see below), whose sum is σ = 52232256000. Its totient is φ = 5408548992.

The previous prime is 21022204069. The next prime is 21022204111. The reversal of 21022204110 is 1140222012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21022204110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022204111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1250541 + ... + 1267239.

It is an arithmetic number, because the mean of its divisors is an integer number (816129000).

Almost surely, 2^21022204110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21022204110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26116128000).

21022204110 is an abundant number, since it is smaller than the sum of its proper divisors (31210051890).

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

21022204110 is a wasteful number, since it uses less digits than its factorization.

21022204110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18185.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21022204110 its reverse (1140222012), we get a palindrome (22162426122).

The spelling of 21022204110 in words is "twenty-one billion, twenty-two million, two hundred four thousand, one hundred ten".