3216033640221 has 4 divisors (see below), whose sum is σ = 4288044853632. Its totient is φ = 2144022426812.

The previous prime is 3216033640219. The next prime is 3216033640229. The reversal of 3216033640221 is 1220463306123.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 3216033640221 - 2¹ = 3216033640219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216033640229) 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, 536005606701 + ... + 536005606706.

It is an arithmetic number, because the mean of its divisors is an integer number (1072011213408).

Almost surely, 2^{3216033640221} is an apocalyptic number.

It is an amenable number.

3216033640221 is a deficient number, since it is larger than the sum of its proper divisors (1072011213411).

3216033640221 is a wasteful number, since it uses less digits than its factorization.

3216033640221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072011213410.

The product of its (nonzero) digits is 31104, while the sum is 33.

Adding to 3216033640221 its reverse (1220463306123), we get a palindrome (4436496946344).

The spelling of 3216033640221 in words is "three trillion, two hundred sixteen billion, thirty-three million, six hundred forty thousand, two hundred twenty-one".