100221275 has 36 divisors (see below), whose sum is σ = 156146256. Its totient is φ = 62462400.

The previous prime is 100221259. The next prime is 100221293. The reversal of 100221275 is 572122001.

It is not a de Polignac number, because 100221275 - 2⁴ = 100221259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18809 + ... + 23541.

It is an arithmetic number, because the mean of its divisors is an integer number (4337396).

Almost surely, 2^100221275 is an apocalyptic number.

100221275 is a deficient number, since it is larger than the sum of its proper divisors (55924981).

100221275 is a wasteful number, since it uses less digits than its factorization.

100221275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4772 (or 4756 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 100221275 is about 10011.0576364338. The cubic root of 100221275 is about 464.5009870117.

Adding to 100221275 its reverse (572122001), we get a palindrome (672343276).

The spelling of 100221275 in words is "one hundred million, two hundred twenty-one thousand, two hundred seventy-five".