221021220110122 has 16 divisors (see below), whose sum is σ = 343889021678400. Its totient is φ = 106461957565152.

The previous prime is 221021220110027. The next prime is 221021220110137. The reversal of 221021220110122 is 221011022120122.

221021220110122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221021220110122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17602830622 + ... + 17602843177.

It is an arithmetic number, because the mean of its divisors is an integer number (21493063854900).

Almost surely, 2^{221021220110122} is an apocalyptic number.

221021220110122 is a deficient number, since it is larger than the sum of its proper divisors (122867801568278).

221021220110122 is a wasteful number, since it uses less digits than its factorization.

221021220110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35205673917.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221021220110122 its reverse (221011022120122), we get a palindrome (442032242230244).

The spelling of 221021220110122 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-two".