21220020221110 has 64 divisors (see below), whose sum is σ = 39623775592320. Its totient is φ = 8175386419200.

The previous prime is 21220020221063. The next prime is 21220020221131. The reversal of 21220020221110 is 1112202002212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224434326 + ... + 224528854.

It is an arithmetic number, because the mean of its divisors is an integer number (619121493630).

Almost surely, 2^{21220020221110} is an apocalyptic number.

21220020221110 is a deficient number, since it is larger than the sum of its proper divisors (18403755371210).

21220020221110 is a wasteful number, since it uses less digits than its factorization.

21220020221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100681.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21220020221110 its reverse (1112202002212), we get a palindrome (22332222223322).

The spelling of 21220020221110 in words is "twenty-one trillion, two hundred twenty billion, twenty million, two hundred twenty-one thousand, one hundred ten".