100221284 has 6 divisors (see below), whose sum is σ = 175387254. Its totient is φ = 50110640.

The previous prime is 100221259. The next prime is 100221293. The reversal of 100221284 is 482122001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 70190884 + 30030400 = 8378^2 + 5480^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12527657 + ... + 12527664.

It is an arithmetic number, because the mean of its divisors is an integer number (29231209).

Almost surely, 2^100221284 is an apocalyptic number.

It is an amenable number.

100221284 is a deficient number, since it is larger than the sum of its proper divisors (75165970).

100221284 is a wasteful number, since it uses less digits than its factorization.

100221284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25055325 (or 25055323 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 100221284 is about 10011.0580859368. The cubic root of 100221284 is about 464.5010009159.

Adding to 100221284 its reverse (482122001), we get a palindrome (582343285).

The spelling of 100221284 in words is "one hundred million, two hundred twenty-one thousand, two hundred eighty-four".