100001121191 has 2 divisors, whose sum is σ = 100001121192. Its totient is φ = 100001121190.

The previous prime is 100001121137. The next prime is 100001121239. The reversal of 100001121191 is 191121100001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100001121191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100001121491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000560595 + 50000560596.

It is an arithmetic number, because the mean of its divisors is an integer number (50000560596).

Almost surely, 2^100001121191 is an apocalyptic number.

100001121191 is a deficient number, since it is larger than the sum of its proper divisors (1).

100001121191 is an equidigital number, since it uses as much as digits as its factorization.

100001121191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 100001121191 its reverse (191121100001), we get a palindrome (291122221192).

The spelling of 100001121191 in words is "one hundred billion, one million, one hundred twenty-one thousand, one hundred ninety-one".