221335223134544 has 10 divisors (see below), whose sum is σ = 428836994823210. Its totient is φ = 110667611567264.

The previous prime is 221335223134523. The next prime is 221335223134591. The reversal of 221335223134544 is 445431322533122.

It can be written as a sum of positive squares in only one way, i.e., 206287495994944 + 15047727139600 = 14362712^2 + 3879140^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221335223134495 and 221335223134504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6916725722939 + ... + 6916725722970.

It is an arithmetic number, because the mean of its divisors is an integer number (42883699482321).

Almost surely, 2^{221335223134544} is an apocalyptic number.

It is an amenable number.

221335223134544 is a deficient number, since it is larger than the sum of its proper divisors (207501771688666).

221335223134544 is a wasteful number, since it uses less digits than its factorization.

221335223134544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13833451445917 (or 13833451445911 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 44.

Adding to 221335223134544 its reverse (445431322533122), we get a palindrome (666766545667666).

The spelling of 221335223134544 in words is "two hundred twenty-one trillion, three hundred thirty-five billion, two hundred twenty-three million, one hundred thirty-four thousand, five hundred forty-four".