120210091 has 2 divisors, whose sum is σ = 120210092. Its totient is φ = 120210090.

The previous prime is 120210089. The next prime is 120210109. The reversal of 120210091 is 190012021.

Together with next prime (120210109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (190012021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120210091 - 2¹ = 120210089 is a prime.

It is a super-3 number, since 3×120210091³ (a number of 25 digits) contains 333 as substring.

Together with 120210089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (120210001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60105045 + 60105046.

It is an arithmetic number, because the mean of its divisors is an integer number (60105046).

Almost surely, 2^120210091 is an apocalyptic number.

120210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

120210091 is an equidigital number, since it uses as much as digits as its factorization.

120210091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 120210091 is about 10964.0362549565. The cubic root of 120210091 is about 493.5300964671.

The spelling of 120210091 in words is "one hundred twenty million, two hundred ten thousand, ninety-one".