191001002011 has 2 divisors, whose sum is σ = 191001002012. Its totient is φ = 191001002010.

The previous prime is 191001001999. The next prime is 191001002033. The reversal of 191001002011 is 110200100191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191001002011 - 2⁵ = 191001001979 is a prime.

It is not a weakly prime, because it can be changed into another prime (191001002051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95500501005 + 95500501006.

It is an arithmetic number, because the mean of its divisors is an integer number (95500501006).

Almost surely, 2^191001002011 is an apocalyptic number.

191001002011 is a deficient number, since it is larger than the sum of its proper divisors (1).

191001002011 is an equidigital number, since it uses as much as digits as its factorization.

191001002011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 191001002011 in words is "one hundred ninety-one billion, one million, two thousand, eleven".