221011032 has 64 divisors (see below), whose sum is σ = 610444800. Its totient is φ = 66119040.

The previous prime is 221010971. The next prime is 221011057. The reversal of 221011032 is 230110122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 221010999 and 221011017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15558 + ... + 26154.

It is an arithmetic number, because the mean of its divisors is an integer number (9538200).

Almost surely, 2^221011032 is an apocalyptic number.

221011032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221011032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305222400).

221011032 is an abundant number, since it is smaller than the sum of its proper divisors (389433768).

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

221011032 is a wasteful number, since it uses less digits than its factorization.

221011032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10696 (or 10692 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221011032 is about 14866.4397890013. The cubic root of 221011032 is about 604.6044195922.

Adding to 221011032 its reverse (230110122), we get a palindrome (451121154).

The spelling of 221011032 in words is "two hundred twenty-one million, eleven thousand, thirty-two".