191109291103 has 2 divisors, whose sum is σ = 191109291104. Its totient is φ = 191109291102.

The previous prime is 191109291091. The next prime is 191109291127. The reversal of 191109291103 is 301192901191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191109291103 - 2²¹ = 191107193951 is a prime.

It is a super-2 number, since 2×191109291103² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191109298103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95554645551 + 95554645552.

It is an arithmetic number, because the mean of its divisors is an integer number (95554645552).

Almost surely, 2^191109291103 is an apocalyptic number.

191109291103 is a deficient number, since it is larger than the sum of its proper divisors (1).

191109291103 is an equidigital number, since it uses as much as digits as its factorization.

191109291103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 37.

The spelling of 191109291103 in words is "one hundred ninety-one billion, one hundred nine million, two hundred ninety-one thousand, one hundred three".