16221933221503 has 4 divisors (see below), whose sum is σ = 16229377892440. Its totient is φ = 16214488550568.

The previous prime is 16221933221491. The next prime is 16221933221509. The reversal of 16221933221503 is 30512233912261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16221933221503 - 2³³ = 16213343286911 is a prime.

It is a super-2 number, since 2×16221933221503² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221933221509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3722332200 + ... + 3722336557.

It is an arithmetic number, because the mean of its divisors is an integer number (4057344473110).

Almost surely, 2^{16221933221503} is an apocalyptic number.

16221933221503 is a deficient number, since it is larger than the sum of its proper divisors (7444670937).

16221933221503 is an equidigital number, since it uses as much as digits as its factorization.

16221933221503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7444670936.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 16221933221503 in words is "sixteen trillion, two hundred twenty-one billion, nine hundred thirty-three million, two hundred twenty-one thousand, five hundred three".