120021091 has 2 divisors, whose sum is σ = 120021092. Its totient is φ = 120021090.

The previous prime is 120021067. The next prime is 120021101. The reversal of 120021091 is 190120021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120021091 - 2⁷ = 120020963 is a prime.

It is not a weakly prime, because it can be changed into another prime (120021191) 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, 60010545 + 60010546.

It is an arithmetic number, because the mean of its divisors is an integer number (60010546).

Almost surely, 2^120021091 is an apocalyptic number.

120021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021091 is an equidigital number, since it uses as much as digits as its factorization.

120021091 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 120021091 is about 10955.4137758462. The cubic root of 120021091 is about 493.2713103282.

The spelling of 120021091 in words is "one hundred twenty million, twenty-one thousand, ninety-one".