2100112123 has 4 divisors (see below), whose sum is σ = 2210644360. Its totient is φ = 1989579888.

The previous prime is 2100112117. The next prime is 2100112207. The reversal of 2100112123 is 3212110012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100112123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100112523) 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, 55266090 + ... + 55266127.

It is an arithmetic number, because the mean of its divisors is an integer number (552661090).

Almost surely, 2^2100112123 is an apocalyptic number.

2100112123 is a deficient number, since it is larger than the sum of its proper divisors (110532237).

2100112123 is a wasteful number, since it uses less digits than its factorization.

2100112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110532236.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2100112123 is about 45826.9802954548. The cubic root of 2100112123 is about 1280.6019554355.

Adding to 2100112123 its reverse (3212110012), we get a palindrome (5312222135).

It can be divided in two parts, 21001 and 12123, that added together give a square (33124 = 182²).

The spelling of 2100112123 in words is "two billion, one hundred million, one hundred twelve thousand, one hundred twenty-three".