221122221104 has 80 divisors (see below), whose sum is σ = 451147687200. Its totient is φ = 104837332992.

The previous prime is 221122221091. The next prime is 221122221113. The reversal of 221122221104 is 401122221122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33313274 + ... + 33319910.

It is an arithmetic number, because the mean of its divisors is an integer number (5639346090).

Almost surely, 2^221122221104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221122221104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225573843600).

221122221104 is an abundant number, since it is smaller than the sum of its proper divisors (230025466096).

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

221122221104 is a wasteful number, since it uses less digits than its factorization.

221122221104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7950 (or 7944 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221122221104 its reverse (401122221122), we get a palindrome (622244442226).

The spelling of 221122221104 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred four".