2123303111 has 4 divisors (see below), whose sum is σ = 2248203312. Its totient is φ = 1998402912.

The previous prime is 2123303101. The next prime is 2123303113. The reversal of 2123303111 is 1113033212.

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 2123303111 - 2⁶ = 2123303047 is a prime.

It is a super-2 number, since 2×2123303111² = 9016832202364556642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 124900183 = 2123303111 / (2 + 1 + 2 + 3 + 3 + 0 + 3 + 1 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123303111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123303113) 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 3 ways as a sum of consecutive naturals, for example, 62450075 + ... + 62450108.

It is an arithmetic number, because the mean of its divisors is an integer number (562050828).

Almost surely, 2^2123303111 is an apocalyptic number.

2123303111 is a deficient number, since it is larger than the sum of its proper divisors (124900201).

2123303111 is a wasteful number, since it uses less digits than its factorization.

2123303111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124900200.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2123303111 is about 46079.3132652821. The cubic root of 2123303111 is about 1285.2984940469.

Adding to 2123303111 its reverse (1113033212), we get a palindrome (3236336323).

The spelling of 2123303111 in words is "two billion, one hundred twenty-three million, three hundred three thousand, one hundred eleven".