2111323123 has 16 divisors (see below), whose sum is σ = 2651588800. Its totient is φ = 1670493888.

The previous prime is 2111323117. The next prime is 2111323127. The reversal of 2111323123 is 3213231112.

It is a de Polignac number, because none of the positive numbers 2^k-2111323123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111323123.

It is not an unprimeable number, because it can be changed into a prime (2111323127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232290 + ... + 241207.

It is an arithmetic number, because the mean of its divisors is an integer number (165724300).

Almost surely, 2^2111323123 is an apocalyptic number.

2111323123 is a deficient number, since it is larger than the sum of its proper divisors (540265677).

2111323123 is an equidigital number, since it uses as much as digits as its factorization.

2111323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473531 (or 473517 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 2111323123 is about 45949.1362595642. The cubic root of 2111323123 is about 1282.8766525668.

Adding to 2111323123 its reverse (3213231112), we get a palindrome (5324554235).

The spelling of 2111323123 in words is "two billion, one hundred eleven million, three hundred twenty-three thousand, one hundred twenty-three".