100221787 has 8 divisors (see below), whose sum is σ = 104755104. Its totient is φ = 95703168.

The previous prime is 100221763. The next prime is 100221809. The reversal of 100221787 is 787122001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100221787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100221727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11683 + ... + 18355.

It is an arithmetic number, because the mean of its divisors is an integer number (13094388).

Almost surely, 2^100221787 is an apocalyptic number.

100221787 is a deficient number, since it is larger than the sum of its proper divisors (4533317).

100221787 is an equidigital number, since it uses as much as digits as its factorization.

100221787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7349.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 100221787 is about 10011.0832081249. The cubic root of 100221787 is about 464.5017780084.

Adding to 100221787 its reverse (787122001), we get a palindrome (887343788).

The spelling of 100221787 in words is "one hundred million, two hundred twenty-one thousand, seven hundred eighty-seven".