120211391 has 2 divisors, whose sum is σ = 120211392. Its totient is φ = 120211390.

The previous prime is 120211361. The next prime is 120211433. The reversal of 120211391 is 193112021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120211391 - 2⁶ = 120211327 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120211361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60105695 + 60105696.

It is an arithmetic number, because the mean of its divisors is an integer number (60105696).

Almost surely, 2^120211391 is an apocalyptic number.

120211391 is a deficient number, since it is larger than the sum of its proper divisors (1).

120211391 is an equidigital number, since it uses as much as digits as its factorization.

120211391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 120211391 is about 10964.0955395327. The cubic root of 120211391 is about 493.5318755380.

The spelling of 120211391 in words is "one hundred twenty million, two hundred eleven thousand, three hundred ninety-one".