221110131032 has 128 divisors (see below), whose sum is σ = 518512803840. Its totient is φ = 86201763840.

The previous prime is 221110131017. The next prime is 221110131037. The reversal of 221110131032 is 230131011122.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 221110131032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110131037) 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, 25877753 + ... + 25886295.

It is an arithmetic number, because the mean of its divisors is an integer number (4050881280).

Almost surely, 2^221110131032 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 221110131032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259256401920).

221110131032 is an abundant number, since it is smaller than the sum of its proper divisors (297402672808).

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

221110131032 is a wasteful number, since it uses less digits than its factorization.

221110131032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9481 (or 9477 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221110131032 its reverse (230131011122), we get a palindrome (451241142154).

The spelling of 221110131032 in words is "two hundred twenty-one billion, one hundred ten million, one hundred thirty-one thousand, thirty-two".