111201210210091 has 2 divisors, whose sum is σ = 111201210210092. Its totient is φ = 111201210210090.

The previous prime is 111201210210043. The next prime is 111201210210109. The reversal of 111201210210091 is 190012012102111.

It is a happy number.

Together with next prime (111201210210109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111201210210091 - 2⁷ = 111201210209963 is a prime.

It is not a weakly prime, because it can be changed into another prime (111201210210001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600605105045 + 55600605105046.

It is an arithmetic number, because the mean of its divisors is an integer number (55600605105046).

Almost surely, 2^{111201210210091} is an apocalyptic number.

111201210210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201210210091 is an equidigital number, since it uses as much as digits as its factorization.

111201210210091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 111201210210091 in words is "one hundred eleven trillion, two hundred one billion, two hundred ten million, two hundred ten thousand, ninety-one".