16241636221 has 4 divisors (see below), whose sum is σ = 17096459200. Its totient is φ = 15386813244.

The previous prime is 16241636123. The next prime is 16241636261. The reversal of 16241636221 is 12263614261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16241636221 - 2²⁵ = 16208081789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16241636261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427411461 + ... + 427411498.

It is an arithmetic number, because the mean of its divisors is an integer number (4274114800).

Almost surely, 2^16241636221 is an apocalyptic number.

It is an amenable number.

16241636221 is a deficient number, since it is larger than the sum of its proper divisors (854822979).

16241636221 is an equidigital number, since it uses as much as digits as its factorization.

16241636221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854822978.

The product of its digits is 20736, while the sum is 34.

The spelling of 16241636221 in words is "sixteen billion, two hundred forty-one million, six hundred thirty-six thousand, two hundred twenty-one".