2112123403 has 16 divisors (see below), whose sum is σ = 2357220096. Its totient is φ = 1879326720.

The previous prime is 2112123379. The next prime is 2112123421. The reversal of 2112123403 is 3043212112.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112123403 is a prime.

It is a super-2 number, since 2×2112123403² = 8922130539000600818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112123443) 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 15 ways as a sum of consecutive naturals, for example, 93375 + ... + 113767.

It is an arithmetic number, because the mean of its divisors is an integer number (147326256).

Almost surely, 2^2112123403 is an apocalyptic number.

2112123403 is a deficient number, since it is larger than the sum of its proper divisors (245096693).

2112123403 is a wasteful number, since it uses less digits than its factorization.

2112123403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20694.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2112123403 is about 45957.8437592540. The cubic root of 2112123403 is about 1283.0387201075.

Adding to 2112123403 its reverse (3043212112), we get a palindrome (5155335515).

The spelling of 2112123403 in words is "two billion, one hundred twelve million, one hundred twenty-three thousand, four hundred three".