2123012303 has 4 divisors (see below), whose sum is σ = 2125068528. Its totient is φ = 2120956080.

The previous prime is 2123012273. The next prime is 2123012321. The reversal of 2123012303 is 3032103212.

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-2123012303 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123012323) 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, 1026563 + ... + 1028628.

It is an arithmetic number, because the mean of its divisors is an integer number (531267132).

Almost surely, 2^2123012303 is an apocalyptic number.

2123012303 is a deficient number, since it is larger than the sum of its proper divisors (2056225).

2123012303 is a wasteful number, since it uses less digits than its factorization.

2123012303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056224.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2123012303 is about 46076.1576414527. The cubic root of 2123012303 is about 1285.2398131254.

Adding to 2123012303 its reverse (3032103212), we get a palindrome (5155115515).

Subtracting 2123012303 from its reverse (3032103212), we obtain a palindrome (909090909).

It can be divided in two parts, 21230 and 12303, that added together give a palindrome (33533).

The spelling of 2123012303 in words is "two billion, one hundred twenty-three million, twelve thousand, three hundred three".