2100140123 has 4 divisors (see below), whose sum is σ = 2103646800. Its totient is φ = 2096633448.

The previous prime is 2100140117. The next prime is 2100140149. The reversal of 2100140123 is 3210410012.

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

It is a cyclic number.

It is not a de Polignac number, because 2100140123 - 2¹⁰ = 2100139099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100140098 and 2100140107.

It is not an unprimeable number, because it can be changed into a prime (2100140023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1752440 + ... + 1753637.

It is an arithmetic number, because the mean of its divisors is an integer number (525911700).

Almost surely, 2^2100140123 is an apocalyptic number.

2100140123 is a deficient number, since it is larger than the sum of its proper divisors (3506677).

2100140123 is an equidigital number, since it uses as much as digits as its factorization.

2100140123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506676.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2100140123 is about 45827.2857913274. The cubic root of 2100140123 is about 1280.6076466706.

Adding to 2100140123 its reverse (3210410012), we get a palindrome (5310550135).

The spelling of 2100140123 in words is "two billion, one hundred million, one hundred forty thousand, one hundred twenty-three".