221120221122 has 24 divisors (see below), whose sum is σ = 487214048880. Its totient is φ = 72457473240.

The previous prime is 221120221117. The next prime is 221120221151. The reversal of 221120221122 is 221122021122.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 221120221095 and 221120221104.

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 11 ways as a sum of consecutive naturals, for example, 104104504 + ... + 104106627.

It is an arithmetic number, because the mean of its divisors is an integer number (20300585370).

Almost surely, 2^221120221122 is an apocalyptic number.

221120221122 is an abundant number, since it is smaller than the sum of its proper divisors (266093827758).

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

221120221122 is a wasteful number, since it uses less digits than its factorization.

221120221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208211198 (or 208211195 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221120221122 its reverse (221122021122), we get a palindrome (442242242244).

The spelling of 221120221122 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred twenty-two".