10111111091 has 2 divisors, whose sum is σ = 10111111092. Its totient is φ = 10111111090.

The previous prime is 10111111039. The next prime is 10111111103. The reversal of 10111111091 is 19011111101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10111111091 - 2¹⁰ = 10111110067 is a prime.

It is not a weakly prime, because it can be changed into another prime (10111111691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055555545 + 5055555546.

It is an arithmetic number, because the mean of its divisors is an integer number (5055555546).

Almost surely, 2^10111111091 is an apocalyptic number.

10111111091 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111111091 is an equidigital number, since it uses as much as digits as its factorization.

10111111091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 17.

Adding to 10111111091 its reverse (19011111101), we get a palindrome (29122222192).

The spelling of 10111111091 in words is "ten billion, one hundred eleven million, one hundred eleven thousand, ninety-one".