120021001 has 8 divisors (see below), whose sum is σ = 120849408. Its totient is φ = 119196000.

The previous prime is 120020993. The next prime is 120021017. The reversal of 120021001 is 100120021.

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 120021001 - 2³ = 120020993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120021091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120616 + ... + 121606.

It is an arithmetic number, because the mean of its divisors is an integer number (15106176).

Almost surely, 2^120021001 is an apocalyptic number.

It is an amenable number.

120021001 is a deficient number, since it is larger than the sum of its proper divisors (828407).

120021001 is an equidigital number, since it uses as much as digits as its factorization.

120021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 120021001 is about 10955.4096682872. The cubic root of 120021001 is about 493.2711870320.

Adding to 120021001 its reverse (100120021), we get a palindrome (220141022).

It can be divided in two parts, 1200 and 21001, that added together give a square (22201 = 149²).

The spelling of 120021001 in words is "one hundred twenty million, twenty-one thousand, one".