120030991 has 2 divisors, whose sum is σ = 120030992. Its totient is φ = 120030990.

The previous prime is 120030983. The next prime is 120031063. The reversal of 120030991 is 199030021.

It is a weak prime.

It is an emirp because it is prime and its reverse (199030021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120030991 - 2³ = 120030983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120030901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60015495 + 60015496.

It is an arithmetic number, because the mean of its divisors is an integer number (60015496).

Almost surely, 2^120030991 is an apocalyptic number.

120030991 is a deficient number, since it is larger than the sum of its proper divisors (1).

120030991 is an equidigital number, since it uses as much as digits as its factorization.

120030991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 120030991 is about 10955.8655979343. The cubic root of 120030991 is about 493.2848725326.

The spelling of 120030991 in words is "one hundred twenty million, thirty thousand, nine hundred ninety-one".