221221221110984 has 16 divisors (see below), whose sum is σ = 436620831140400. Its totient is φ = 104788999473552.

The previous prime is 221221221110983. The next prime is 221221221110999. The reversal of 221221221110984 is 489011122122122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (221221221110983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727701385082 + ... + 727701385385.

It is an arithmetic number, because the mean of its divisors is an integer number (27288801946275).

Almost surely, 2^{221221221110984} is an apocalyptic number.

It is an amenable number.

221221221110984 is a deficient number, since it is larger than the sum of its proper divisors (215399610029416).

221221221110984 is a wasteful number, since it uses less digits than its factorization.

221221221110984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455402770492 (or 1455402770488 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The spelling of 221221221110984 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, nine hundred eighty-four".