2123454235403 has 16 divisors (see below), whose sum is σ = 2179768496256. Its totient is φ = 2067618892800.

The previous prime is 2123454235367. The next prime is 2123454235421. The reversal of 2123454235403 is 3045324543212.

It is a cyclic number.

It is not a de Polignac number, because 2123454235403 - 2¹⁸ = 2123453973259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123454235493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13071425 + ... + 13232877.

It is an arithmetic number, because the mean of its divisors is an integer number (136235531016).

Almost surely, 2^{2123454235403} is an apocalyptic number.

2123454235403 is a deficient number, since it is larger than the sum of its proper divisors (56314260853).

2123454235403 is a wasteful number, since it uses less digits than its factorization.

2123454235403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162934.

The product of its (nonzero) digits is 345600, while the sum is 38.

Adding to 2123454235403 its reverse (3045324543212), we get a palindrome (5168778778615).

The spelling of 2123454235403 in words is "two trillion, one hundred twenty-three billion, four hundred fifty-four million, two hundred thirty-five thousand, four hundred three".