221122211022 has 24 divisors (see below), whose sum is σ = 483841673640. Its totient is φ = 72977626800.

The previous prime is 221122210999. The next prime is 221122211029. The reversal of 221122211022 is 220112221122.

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 = 221122210986 and 221122211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122211029) by changing a digit.

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, 60812872 + ... + 60816507.

It is an arithmetic number, because the mean of its divisors is an integer number (20160069735).

Almost surely, 2^221122211022 is an apocalyptic number.

221122211022 is an abundant number, since it is smaller than the sum of its proper divisors (262719462618).

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

221122211022 is a wasteful number, since it uses less digits than its factorization.

221122211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121629488 (or 121629485 counting only the distinct ones).

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

Adding to 221122211022 its reverse (220112221122), we get a palindrome (441234432144).

The spelling of 221122211022 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, twenty-two".