21310123014434 has 16 divisors (see below), whose sum is σ = 31973543864640. Its totient is φ = 10652275299120.

The previous prime is 21310123014391. The next prime is 21310123014449. The reversal of 21310123014434 is 43441032101312.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21310123014397 and 21310123014406.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 236201177 + ... + 236291379.

It is an arithmetic number, because the mean of its divisors is an integer number (1998346491540).

Almost surely, 2^{21310123014434} is an apocalyptic number.

21310123014434 is a deficient number, since it is larger than the sum of its proper divisors (10663420850206).

21310123014434 is a wasteful number, since it uses less digits than its factorization.

21310123014434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119785.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21310123014434 its reverse (43441032101312), we get a palindrome (64751155115746).

The spelling of 21310123014434 in words is "twenty-one trillion, three hundred ten billion, one hundred twenty-three million, fourteen thousand, four hundred thirty-four".