3516217684221 has 16 divisors (see below), whose sum is σ = 5114594631168. Its totient is φ = 2131000945200.

The previous prime is 3516217684219. The next prime is 3516217684249. The reversal of 3516217684221 is 1224867126153.

It is not a de Polignac number, because 3516217684221 - 2¹ = 3516217684219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3516217684261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 829456 + ... + 2778566.

It is an arithmetic number, because the mean of its divisors is an integer number (319662164448).

Almost surely, 2^{3516217684221} is an apocalyptic number.

It is an amenable number.

3516217684221 is a deficient number, since it is larger than the sum of its proper divisors (1598376946947).

3516217684221 is a wasteful number, since it uses less digits than its factorization.

3516217684221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003792.

The product of its digits is 967680, while the sum is 48.

The spelling of 3516217684221 in words is "three trillion, five hundred sixteen billion, two hundred seventeen million, six hundred eighty-four thousand, two hundred twenty-one".