2216887201721 has 8 divisors (see below), whose sum is σ = 2361347976960. Its totient is φ = 2073988164928.

The previous prime is 2216887201693. The next prime is 2216887201787. The reversal of 2216887201721 is 1271027886122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2216887201721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216887203721) 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, 390431681 + ... + 390437358.

It is an arithmetic number, because the mean of its divisors is an integer number (295168497120).

Almost surely, 2^{2216887201721} is an apocalyptic number.

It is an amenable number.

2216887201721 is a deficient number, since it is larger than the sum of its proper divisors (144460775239).

2216887201721 is a wasteful number, since it uses less digits than its factorization.

2216887201721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780869223.

The product of its (nonzero) digits is 301056, while the sum is 47.

The spelling of 2216887201721 in words is "two trillion, two hundred sixteen billion, eight hundred eighty-seven million, two hundred one thousand, seven hundred twenty-one".