221131044001 has 24 divisors (see below), whose sum is σ = 258113382720. Its totient is φ = 188893791072.

The previous prime is 221131043993. The next prime is 221131044031. The reversal of 221131044001 is 100440131122.

It is not a de Polignac number, because 221131044001 - 2³ = 221131043993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221131044001.

It is not an unprimeable number, because it can be changed into a prime (221131044031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28651195 + ... + 28658911.

It is an arithmetic number, because the mean of its divisors is an integer number (10754724280).

Almost surely, 2^221131044001 is an apocalyptic number.

It is an amenable number.

221131044001 is a deficient number, since it is larger than the sum of its proper divisors (36982338719).

221131044001 is a wasteful number, since it uses less digits than its factorization.

221131044001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9653 (or 9646 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221131044001 its reverse (100440131122), we get a palindrome (321571175123).

The spelling of 221131044001 in words is "two hundred twenty-one billion, one hundred thirty-one million, forty-four thousand, one".