221002166894 has 8 divisors (see below), whose sum is σ = 331526732160. Its totient is φ = 110493256176.

The previous prime is 221002166843. The next prime is 221002166899. The reversal of 221002166894 is 498661200122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002166899) 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, 3878279 + ... + 3934850.

It is an arithmetic number, because the mean of its divisors is an integer number (41440841520).

Almost surely, 2^221002166894 is an apocalyptic number.

221002166894 is a deficient number, since it is larger than the sum of its proper divisors (110524565266).

221002166894 is a wasteful number, since it uses less digits than its factorization.

221002166894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7827274.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 221002166894 in words is "two hundred twenty-one billion, two million, one hundred sixty-six thousand, eight hundred ninety-four".