2166221655203 has 8 divisors (see below), whose sum is σ = 2188088163360. Its totient is φ = 2144391382080.

The previous prime is 2166221655187. The next prime is 2166221655211. The reversal of 2166221655203 is 3025561226612.

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

It is a cyclic number.

It is not a de Polignac number, because 2166221655203 - 2⁴ = 2166221655187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166221651203) 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, 8938583 + ... + 9177728.

It is an arithmetic number, because the mean of its divisors is an integer number (273511020420).

Almost surely, 2^{2166221655203} is an apocalyptic number.

2166221655203 is a deficient number, since it is larger than the sum of its proper divisors (21866508157).

2166221655203 is a wasteful number, since it uses less digits than its factorization.

2166221655203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18117517.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 2166221655203 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred fifty-five thousand, two hundred three".