120221999 has 8 divisors (see below), whose sum is σ = 126205440. Its totient is φ = 114370200.

The previous prime is 120221971. The next prime is 120222007. The reversal of 120221999 is 999122021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120221999 - 2⁸ = 120221743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31037 + ... + 34694.

It is an arithmetic number, because the mean of its divisors is an integer number (15775680).

Almost surely, 2^120221999 is an apocalyptic number.

120221999 is a deficient number, since it is larger than the sum of its proper divisors (5983441).

120221999 is an equidigital number, since it uses as much as digits as its factorization.

120221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65821.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 120221999 is about 10964.5792896946. The cubic root of 120221999 is about 493.5463922769.

The spelling of 120221999 in words is "one hundred twenty million, two hundred twenty-one thousand, nine hundred ninety-nine".