100221010191 has 12 divisors (see below), whose sum is σ = 146924334232. Its totient is φ = 65816782416.

The previous prime is 100221010093. The next prime is 100221010217. The reversal of 100221010191 is 191010122001.

It is a happy number.

It is not a de Polignac number, because 100221010191 - 2¹⁰ = 100221009167 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 (100221010291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83101396 + ... + 83102601.

Almost surely, 2^100221010191 is an apocalyptic number.

100221010191 is a deficient number, since it is larger than the sum of its proper divisors (46703324041).

100221010191 is a wasteful number, since it uses less digits than its factorization.

100221010191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166204070 (or 166204067 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 100221010191 its reverse (191010122001), we get a palindrome (291231132192).

The spelling of 100221010191 in words is "one hundred billion, two hundred twenty-one million, ten thousand, one hundred ninety-one".