221001044 has 24 divisors (see below), whose sum is σ = 422301600. Its totient is φ = 100362080.

The previous prime is 221001031. The next prime is 221001049. The reversal of 221001044 is 440100122.

221001044 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221001044² = 97682922898179872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001049) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 73727 + ... + 76665.

It is an arithmetic number, because the mean of its divisors is an integer number (17595900).

Almost surely, 2^221001044 is an apocalyptic number.

It is an amenable number.

221001044 is a deficient number, since it is larger than the sum of its proper divisors (201300556).

221001044 is a wasteful number, since it uses less digits than its factorization.

221001044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663 (or 4661 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 221001044 is about 14866.1038607969. The cubic root of 221001044 is about 604.5953116307.

Adding to 221001044 its reverse (440100122), we get a palindrome (661101166).

The spelling of 221001044 in words is "two hundred twenty-one million, one thousand, forty-four".