201111993671 has 2 divisors, whose sum is σ = 201111993672. Its totient is φ = 201111993670.

The previous prime is 201111993637. The next prime is 201111993697. The reversal of 201111993671 is 176399111102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201111993671 - 2³⁴ = 183932124487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201111993631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555996835 + 100555996836.

It is an arithmetic number, because the mean of its divisors is an integer number (100555996836).

Almost surely, 2^201111993671 is an apocalyptic number.

201111993671 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111993671 is an equidigital number, since it uses as much as digits as its factorization.

201111993671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 201111993671 in words is "two hundred one billion, one hundred eleven million, nine hundred ninety-three thousand, six hundred seventy-one".