16141221 has 8 divisors (see below), whose sum is σ = 23912960. Its totient is φ = 10760796.

The previous prime is 16141199. The next prime is 16141247. The reversal of 16141221 is 12214161.

It is not a de Polignac number, because 16141221 - 2⁵ = 16141189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16141194 and 16141203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16141261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298885 + ... + 298938.

It is an arithmetic number, because the mean of its divisors is an integer number (2989120).

Almost surely, 2^16141221 is an apocalyptic number.

It is an amenable number.

16141221 is a deficient number, since it is larger than the sum of its proper divisors (7771739).

16141221 is an equidigital number, since it uses as much as digits as its factorization.

16141221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597832 (or 597826 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 16141221 is about 4017.6138440622. The cubic root of 16141221 is about 252.7234032364.

Adding to 16141221 its reverse (12214161), we get a palindrome (28355382).

The spelling of 16141221 in words is "sixteen million, one hundred forty-one thousand, two hundred twenty-one".