21220110220022 has 16 divisors (see below), whose sum is σ = 37119726333600. Its totient is φ = 9094332951144.

The previous prime is 21220110219877. The next prime is 21220110220031. The reversal of 21220110220022 is 22002201102212.

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 7 ways as a sum of consecutive naturals, for example, 15466551953 + ... + 15466553324.

It is an arithmetic number, because the mean of its divisors is an integer number (2319982895850).

Almost surely, 2^{21220110220022} is an apocalyptic number.

21220110220022 is a deficient number, since it is larger than the sum of its proper divisors (15899616113578).

21220110220022 is an equidigital number, since it uses as much as digits as its factorization.

21220110220022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30933105300 (or 30933105286 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21220110220022 its reverse (22002201102212), we get a palindrome (43222311322234).

The spelling of 21220110220022 in words is "twenty-one trillion, two hundred twenty billion, one hundred ten million, two hundred twenty thousand, twenty-two".