2166221655202 has 8 divisors (see below), whose sum is σ = 3544726344912. Its totient is φ = 984646206900.

The previous prime is 2166221655187. The next prime is 2166221655211. The reversal of 2166221655202 is 2025561226612.

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

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 3 ways as a sum of consecutive naturals, for example, 49232310324 + ... + 49232310367.

It is an arithmetic number, because the mean of its divisors is an integer number (443090793114).

Almost surely, 2^{2166221655202} is an apocalyptic number.

2166221655202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2166221655202 is a deficient number, since it is larger than the sum of its proper divisors (1378504689710).

2166221655202 is a wasteful number, since it uses less digits than its factorization.

2166221655202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98464620704.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 2166221655202 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred fifty-five thousand, two hundred two".