2123122403 has 4 divisors (see below), whose sum is σ = 2123985480. Its totient is φ = 2122259328.

The previous prime is 2123122381. The next prime is 2123122423. The reversal of 2123122403 is 3042213212.

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-2123122403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123122423) 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, 427838 + ... + 432771.

It is an arithmetic number, because the mean of its divisors is an integer number (530996370).

Almost surely, 2^2123122403 is an apocalyptic number.

2123122403 is a deficient number, since it is larger than the sum of its proper divisors (863077).

2123122403 is an equidigital number, since it uses as much as digits as its factorization.

2123122403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863076.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2123122403 is about 46077.3523870459. The cubic root of 2123122403 is about 1285.2620303710.

Adding to 2123122403 its reverse (3042213212), we get a palindrome (5165335615).

It can be divided in two parts, 21231 and 22403, that added together give a palindrome (43634).

The spelling of 2123122403 in words is "two billion, one hundred twenty-three million, one hundred twenty-two thousand, four hundred three".