221368912 has 20 divisors (see below), whose sum is σ = 434945376. Its totient is φ = 109124960.

The previous prime is 221368907. The next prime is 221368933. The reversal of 221368912 is 219863122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96298 + ... + 98569.

Almost surely, 2^221368912 is an apocalyptic number.

It is an amenable number.

221368912 is a deficient number, since it is larger than the sum of its proper divisors (213576464).

221368912 is a wasteful number, since it uses less digits than its factorization.

221368912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194946 (or 194940 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 221368912 is about 14878.4714268637. The cubic root of 221368912 is about 604.9305860302.

The spelling of 221368912 in words is "two hundred twenty-one million, three hundred sixty-eight thousand, nine hundred twelve".