100221245 has 8 divisors (see below), whose sum is σ = 124412760. Its totient is φ = 77412160.

The previous prime is 100221227. The next prime is 100221259. The reversal of 100221245 is 542122001.

It can be written as a sum of positive squares in 4 ways, for example, as 15912121 + 84309124 = 3989^2 + 9182^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100221245 - 2²⁶ = 33112381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345446 + ... + 345735.

It is an arithmetic number, because the mean of its divisors is an integer number (15551595).

Almost surely, 2^100221245 is an apocalyptic number.

It is an amenable number.

100221245 is a deficient number, since it is larger than the sum of its proper divisors (24191515).

100221245 is an equidigital number, since it uses as much as digits as its factorization.

100221245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691215.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 100221245 is about 10011.0561380905. The cubic root of 100221245 is about 464.5009406641.

Adding to 100221245 its reverse (542122001), we get a palindrome (642343246).

The spelling of 100221245 in words is "one hundred million, two hundred twenty-one thousand, two hundred forty-five".