120391511 has 2 divisors, whose sum is σ = 120391512. Its totient is φ = 120391510.

The previous prime is 120391477. The next prime is 120391519. The reversal of 120391511 is 115193021.

It is a strong prime.

It is an emirp because it is prime and its reverse (115193021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120391511 - 2¹⁸ = 120129367 is a 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 (120391519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60195755 + 60195756.

It is an arithmetic number, because the mean of its divisors is an integer number (60195756).

Almost surely, 2^120391511 is an apocalyptic number.

120391511 is a deficient number, since it is larger than the sum of its proper divisors (1).

120391511 is an equidigital number, since it uses as much as digits as its factorization.

120391511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 120391511 is about 10972.3065487618. The cubic root of 120391511 is about 493.7782487496.

The spelling of 120391511 in words is "one hundred twenty million, three hundred ninety-one thousand, five hundred eleven".