2001130123 has 4 divisors (see below), whose sum is σ = 2070134640. Its totient is φ = 1932125608.

The previous prime is 2001130121. The next prime is 2001130127. The reversal of 2001130123 is 3210311002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3210311002 = 2 ⋅1605155501.

It is a cyclic number.

It is not a de Polignac number, because 2001130123 - 2¹ = 2001130121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001130121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34502215 + ... + 34502272.

It is an arithmetic number, because the mean of its divisors is an integer number (517533660).

Almost surely, 2^2001130123 is an apocalyptic number.

2001130123 is a deficient number, since it is larger than the sum of its proper divisors (69004517).

2001130123 is an equidigital number, since it uses as much as digits as its factorization.

2001130123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69004516.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2001130123 is about 44733.9929248441. The cubic root of 2001130123 is about 1260.1583161699.

Adding to 2001130123 its reverse (3210311002), we get a palindrome (5211441125).

The spelling of 2001130123 in words is "two billion, one million, one hundred thirty thousand, one hundred twenty-three".