120021191 has 2 divisors, whose sum is σ = 120021192. Its totient is φ = 120021190.

The previous prime is 120021137. The next prime is 120021197. The reversal of 120021191 is 191120021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120021191 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 (120021197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010595 + 60010596.

It is an arithmetic number, because the mean of its divisors is an integer number (60010596).

Almost surely, 2^120021191 is an apocalyptic number.

120021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021191 is an equidigital number, since it uses as much as digits as its factorization.

120021191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 120021191 is about 10955.4183397988. The cubic root of 120021191 is about 493.2714473239.

The spelling of 120021191 in words is "one hundred twenty million, twenty-one thousand, one hundred ninety-one".