221141231644 has 12 divisors (see below), whose sum is σ = 387012486168. Its totient is φ = 110566235600.

The previous prime is 221141231603. The next prime is 221141231711. The reversal of 221141231644 is 446132141122.

It is a happy number.

221141231644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980122 + ... + 1184449.

It is an arithmetic number, because the mean of its divisors is an integer number (32251040514).

Almost surely, 2^221141231644 is an apocalyptic number.

It is an amenable number.

221141231644 is a deficient number, since it is larger than the sum of its proper divisors (165871254524).

221141231644 is a wasteful number, since it uses less digits than its factorization.

221141231644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190116 (or 2190114 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

Adding to 221141231644 its reverse (446132141122), we get a palindrome (667273372766).

The spelling of 221141231644 in words is "two hundred twenty-one billion, one hundred forty-one million, two hundred thirty-one thousand, six hundred forty-four".