221043405332 has 12 divisors (see below), whose sum is σ = 386834925876. Its totient is φ = 110519140800.

The previous prime is 221043405313. The next prime is 221043405377. The reversal of 221043405332 is 233504340122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16229231236 + 204814174096 = 127394^2 + 452564^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221043405295 and 221043405304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439313 + ... + 796920.

It is an arithmetic number, because the mean of its divisors is an integer number (32236243823).

Almost surely, 2^221043405332 is an apocalyptic number.

It is an amenable number.

221043405332 is a deficient number, since it is larger than the sum of its proper divisors (165791520544).

221043405332 is a wasteful number, since it uses less digits than its factorization.

221043405332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280938 (or 1280936 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 221043405332 its reverse (233504340122), we get a palindrome (454547745454).

The spelling of 221043405332 in words is "two hundred twenty-one billion, forty-three million, four hundred five thousand, three hundred thirty-two".