102011102191 has 2 divisors, whose sum is σ = 102011102192. Its totient is φ = 102011102190.

The previous prime is 102011102161. The next prime is 102011102233. The reversal of 102011102191 is 191201110201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102011102191 - 2⁹ = 102011101679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102011102111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51005551095 + 51005551096.

It is an arithmetic number, because the mean of its divisors is an integer number (51005551096).

Almost surely, 2^102011102191 is an apocalyptic number.

102011102191 is a deficient number, since it is larger than the sum of its proper divisors (1).

102011102191 is an equidigital number, since it uses as much as digits as its factorization.

102011102191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 102011102191 its reverse (191201110201), we get a palindrome (293212212392).

The spelling of 102011102191 in words is "one hundred two billion, eleven million, one hundred two thousand, one hundred ninety-one".