100220191 has 8 divisors (see below), whose sum is σ = 102377520. Its totient is φ = 98072832.

The previous prime is 100220189. The next prime is 100220203. The reversal of 100220191 is 191022001.

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

It is a cyclic number.

It is not a de Polignac number, because 100220191 - 2¹ = 100220189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100220101) 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, 19951 + ... + 24463.

It is an arithmetic number, because the mean of its divisors is an integer number (12797190).

Almost surely, 2^100220191 is an apocalyptic number.

100220191 is a deficient number, since it is larger than the sum of its proper divisors (2157329).

100220191 is an equidigital number, since it uses as much as digits as its factorization.

100220191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 100220191 is about 10011.0034961536. The cubic root of 100220191 is about 464.4993123144.

Adding to 100220191 its reverse (191022001), we get a palindrome (291242192).

The spelling of 100220191 in words is "one hundred million, two hundred twenty thousand, one hundred ninety-one".