221868890168 has 16 divisors (see below), whose sum is σ = 416012727480. Its totient is φ = 110932162848.

The previous prime is 221868890143. The next prime is 221868890183. The reversal of 221868890168 is 861098868122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170771 + ... + 687677.

Almost surely, 2^221868890168 is an apocalyptic number.

It is an amenable number.

221868890168 is a deficient number, since it is larger than the sum of its proper divisors (194143837312).

221868890168 is a wasteful number, since it uses less digits than its factorization.

221868890168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570566 (or 570562 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 59.

The spelling of 221868890168 in words is "two hundred twenty-one billion, eight hundred sixty-eight million, eight hundred ninety thousand, one hundred sixty-eight".