221110561122 has 64 divisors (see below), whose sum is σ = 487111173120. Its totient is φ = 66352737600.

The previous prime is 221110561099. The next prime is 221110561123. The reversal of 221110561122 is 221165011122.

It is a happy number.

221110561122 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221110561092 and 221110561101.

It is not an unprimeable number, because it can be changed into a prime (221110561123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15323203 + ... + 15337625.

It is an arithmetic number, because the mean of its divisors is an integer number (7611112080).

Almost surely, 2^221110561122 is an apocalyptic number.

221110561122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 221110561122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243555586560).

221110561122 is an abundant number, since it is smaller than the sum of its proper divisors (266000611998).

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

221110561122 is a wasteful number, since it uses less digits than its factorization.

221110561122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16679.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 221110561122 its reverse (221165011122), we get a palindrome (442275572244).

The spelling of 221110561122 in words is "two hundred twenty-one billion, one hundred ten million, five hundred sixty-one thousand, one hundred twenty-two".