100011111111091 has 2 divisors, whose sum is σ = 100011111111092. Its totient is φ = 100011111111090.

The previous prime is 100011111111071. The next prime is 100011111111097. The reversal of 100011111111091 is 190111111110001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100011111111091 - 2⁹ = 100011111110579 is a prime.

It is not a weakly prime, because it can be changed into another prime (100011111111097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50005555555545 + 50005555555546.

It is an arithmetic number, because the mean of its divisors is an integer number (50005555555546).

Almost surely, 2^{100011111111091} is an apocalyptic number.

100011111111091 is a deficient number, since it is larger than the sum of its proper divisors (1).

100011111111091 is an equidigital number, since it uses as much as digits as its factorization.

100011111111091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 19.

Adding to 100011111111091 its reverse (190111111110001), we get a palindrome (290122222221092).

The spelling of 100011111111091 in words is "one hundred trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, ninety-one".