120100001 has 4 divisors (see below), whose sum is σ = 137257152. Its totient is φ = 102942852.

The previous prime is 120099977. The next prime is 120100003. The reversal of 120100001 is 100001021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120100001 - 2¹⁰ = 120098977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120100003) 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 3 ways as a sum of consecutive naturals, for example, 8578565 + ... + 8578578.

It is an arithmetic number, because the mean of its divisors is an integer number (34314288).

Almost surely, 2^120100001 is an apocalyptic number.

It is an amenable number.

120100001 is a deficient number, since it is larger than the sum of its proper divisors (17157151).

120100001 is an equidigital number, since it uses as much as digits as its factorization.

120100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17157150.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 120100001 is about 10959.0145998625. The cubic root of 120100001 is about 493.3793899761.

Adding to 120100001 its reverse (100001021), we get a palindrome (220101022).

The spelling of 120100001 in words is "one hundred twenty million, one hundred thousand, one".