191011102231 has 4 divisors (see below), whose sum is σ = 194248578600. Its totient is φ = 187773625864.

The previous prime is 191011102189. The next prime is 191011102241. The reversal of 191011102231 is 132201110191.

191011102231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 191011102231 - 2¹³ = 191011094039 is a prime.

It is a super-2 number, since 2×191011102231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191011102241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1618738096 + ... + 1618738213.

It is an arithmetic number, because the mean of its divisors is an integer number (48562144650).

Almost surely, 2^191011102231 is an apocalyptic number.

191011102231 is a deficient number, since it is larger than the sum of its proper divisors (3237476369).

191011102231 is an equidigital number, since it uses as much as digits as its factorization.

191011102231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237476368.

The product of its (nonzero) digits is 108, while the sum is 22.

The spelling of 191011102231 in words is "one hundred ninety-one billion, eleven million, one hundred two thousand, two hundred thirty-one".