120101001 has 12 divisors (see below), whose sum is σ = 164585232. Its totient is φ = 77900688.

The previous prime is 120100999. The next prime is 120101011. The reversal of 120101001 is 100101021.

It is not a de Polignac number, because 120101001 - 2¹ = 120100999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120101011) 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 11 ways as a sum of consecutive naturals, for example, 10515 + ... + 18728.

It is an arithmetic number, because the mean of its divisors is an integer number (13715436).

Almost surely, 2^120101001 is an apocalyptic number.

It is an amenable number.

120101001 is a deficient number, since it is larger than the sum of its proper divisors (44484231).

120101001 is an equidigital number, since it uses as much as digits as its factorization.

120101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29320 (or 29283 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 120101001 is about 10959.0602243076. The cubic root of 120101001 is about 493.3807593295.

Adding to 120101001 its reverse (100101021), we get a palindrome (220202022).

The spelling of 120101001 in words is "one hundred twenty million, one hundred one thousand, one".