221055802816 has 14 divisors (see below), whose sum is σ = 438657608840. Its totient is φ = 110527901376.

The previous prime is 221055802787. The next prime is 221055802867. The reversal of 221055802816 is 618208550122.

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, 1726998396 + ... + 1726998523.

Almost surely, 2^221055802816 is an apocalyptic number.

It is an amenable number.

221055802816 is a deficient number, since it is larger than the sum of its proper divisors (217601806024).

221055802816 is an equidigital number, since it uses as much as digits as its factorization.

221055802816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453996931 (or 3453996921 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The spelling of 221055802816 in words is "two hundred twenty-one billion, fifty-five million, eight hundred two thousand, eight hundred sixteen".