221122211020 has 12 divisors (see below), whose sum is σ = 464356643184. Its totient is φ = 88448884400.

The previous prime is 221122210999. The next prime is 221122211029. The reversal of 221122211020 is 20112221122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221122210985 and 221122211003.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5528055256 + ... + 5528055295.

It is an arithmetic number, because the mean of its divisors is an integer number (38696386932).

Almost surely, 2^221122211020 is an apocalyptic number.

221122211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122211020 is an abundant number, since it is smaller than the sum of its proper divisors (243234432164).

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

221122211020 is a wasteful number, since it uses less digits than its factorization.

221122211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11056110560 (or 11056110558 counting only the distinct ones).

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

Adding to 221122211020 its reverse (20112221122), we get a palindrome (241234432142).

The spelling of 221122211020 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, twenty".