2130123999 has 4 divisors (see below), whose sum is σ = 2840165336. Its totient is φ = 1420082664.

The previous prime is 2130123971. The next prime is 2130124019. The reversal of 2130123999 is 9993210312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2130123999 - 2⁵ = 2130123967 is a prime.

It is a super-2 number, since 2×2130123999² = 9074856502231504002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130123199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355020664 + ... + 355020669.

It is an arithmetic number, because the mean of its divisors is an integer number (710041334).

Almost surely, 2^2130123999 is an apocalyptic number.

2130123999 is a deficient number, since it is larger than the sum of its proper divisors (710041337).

2130123999 is an equidigital number, since it uses as much as digits as its factorization.

2130123999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710041336.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 2130123999 is about 46153.2663957818. The cubic root of 2130123999 is about 1286.6733183619.

The spelling of 2130123999 in words is "two billion, one hundred thirty million, one hundred twenty-three thousand, nine hundred ninety-nine".