16621221214 has 16 divisors (see below), whose sum is σ = 26883814608. Its totient is φ = 7661575872.

The previous prime is 16621221203. The next prime is 16621221233. The reversal of 16621221214 is 41212212661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385687 + ... + 426610.

It is an arithmetic number, because the mean of its divisors is an integer number (1680238413).

Almost surely, 2^16621221214 is an apocalyptic number.

16621221214 is a deficient number, since it is larger than the sum of its proper divisors (10262593394).

16621221214 is a wasteful number, since it uses less digits than its factorization.

16621221214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813099.

The product of its digits is 2304, while the sum is 28.

Adding to 16621221214 its reverse (41212212661), we get a palindrome (57833433875).

The spelling of 16621221214 in words is "sixteen billion, six hundred twenty-one million, two hundred twenty-one thousand, two hundred fourteen".