120102001 has 2 divisors, whose sum is σ = 120102002. Its totient is φ = 120102000.

The previous prime is 120101999. The next prime is 120102013. The reversal of 120102001 is 100201021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111830625 + 8271376 = 10575^2 + 2876^2 .

It is a cyclic number.

It is not a de Polignac number, because 120102001 - 2¹ = 120101999 is a prime.

Together with 120101999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (120106001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60051000 + 60051001.

It is an arithmetic number, because the mean of its divisors is an integer number (60051001).

Almost surely, 2^120102001 is an apocalyptic number.

It is an amenable number.

120102001 is a deficient number, since it is larger than the sum of its proper divisors (1).

120102001 is an equidigital number, since it uses as much as digits as its factorization.

120102001 is an odious number, because the sum of its binary digits is odd.

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

The square root of 120102001 is about 10959.1058485626. The cubic root of 120102001 is about 493.3821286753.

Adding to 120102001 its reverse (100201021), we get a palindrome (220303022).

The spelling of 120102001 in words is "one hundred twenty million, one hundred two thousand, one".