100111131091 has 2 divisors, whose sum is σ = 100111131092. Its totient is φ = 100111131090.

The previous prime is 100111131049. The next prime is 100111131193. The reversal of 100111131091 is 190131111001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100111131091 - 2¹⁵ = 100111098323 is a prime.

It is not a weakly prime, because it can be changed into another prime (100111131031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055565545 + 50055565546.

It is an arithmetic number, because the mean of its divisors is an integer number (50055565546).

Almost surely, 2^100111131091 is an apocalyptic number.

100111131091 is a deficient number, since it is larger than the sum of its proper divisors (1).

100111131091 is an equidigital number, since it uses as much as digits as its factorization.

100111131091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 19.

Adding to 100111131091 its reverse (190131111001), we get a palindrome (290242242092).

The spelling of 100111131091 in words is "one hundred billion, one hundred eleven million, one hundred thirty-one thousand, ninety-one".