2143100123 has 4 divisors (see below), whose sum is σ = 2175086760. Its totient is φ = 2111113488.

The previous prime is 2143100119. The next prime is 2143100131. The reversal of 2143100123 is 3210013412.

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 2143100123 - 2² = 2143100119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143100023) 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, 15993218 + ... + 15993351.

It is an arithmetic number, because the mean of its divisors is an integer number (543771690).

Almost surely, 2^2143100123 is an apocalyptic number.

2143100123 is a deficient number, since it is larger than the sum of its proper divisors (31986637).

2143100123 is an equidigital number, since it uses as much as digits as its factorization.

2143100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31986636.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2143100123 is about 46293.6293997349. The cubic root of 2143100123 is about 1289.2807165345.

Adding to 2143100123 its reverse (3210013412), we get a palindrome (5353113535).

The spelling of 2143100123 in words is "two billion, one hundred forty-three million, one hundred thousand, one hundred twenty-three".