221644132103 has 16 divisors (see below), whose sum is σ = 249140428800. Its totient is φ = 196198057440.

The previous prime is 221644132063. The next prime is 221644132111. The reversal of 221644132103 is 301231446122.

It is a cyclic number.

It is not a de Polignac number, because 221644132103 - 2¹² = 221644128007 is a prime.

It is a super-2 number, since 2×221644132103² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221644138103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6470951 + ... + 6505112.

It is an arithmetic number, because the mean of its divisors is an integer number (15571276800).

Almost surely, 2^221644132103 is an apocalyptic number.

221644132103 is a deficient number, since it is larger than the sum of its proper divisors (27496296697).

221644132103 is a wasteful number, since it uses less digits than its factorization.

221644132103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12976142.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 221644132103 its reverse (301231446122), we get a palindrome (522875578225).

The spelling of 221644132103 in words is "two hundred twenty-one billion, six hundred forty-four million, one hundred thirty-two thousand, one hundred three".