109121191 has 2 divisors, whose sum is σ = 109121192. Its totient is φ = 109121190.

The previous prime is 109121167. The next prime is 109121197. The reversal of 109121191 is 191121901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109121191 - 2⁹ = 109120679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109121197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54560595 + 54560596.

It is an arithmetic number, because the mean of its divisors is an integer number (54560596).

Almost surely, 2^109121191 is an apocalyptic number.

109121191 is a deficient number, since it is larger than the sum of its proper divisors (1).

109121191 is an equidigital number, since it uses as much as digits as its factorization.

109121191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 25.

The square root of 109121191 is about 10446.1088927887. The cubic root of 109121191 is about 477.8625898333.

The spelling of 109121191 in words is "one hundred nine million, one hundred twenty-one thousand, one hundred ninety-one".