21013503221434 has 16 divisors (see below), whose sum is σ = 32191036848000. Its totient is φ = 10283159526304.

The previous prime is 21013503221393. The next prime is 21013503221483. The reversal of 21013503221434 is 43412230531012.

It is a junction number, because it is equal to n+sod(n) for n = 21013503221396 and 21013503221405.

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, 36970062 + ... + 37534150.

It is an arithmetic number, because the mean of its divisors is an integer number (2011939803000).

Almost surely, 2^{21013503221434} is an apocalyptic number.

21013503221434 is a deficient number, since it is larger than the sum of its proper divisors (11177533626566).

21013503221434 is a wasteful number, since it uses less digits than its factorization.

21013503221434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960437.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 21013503221434 its reverse (43412230531012), we get a palindrome (64425733752446).

The spelling of 21013503221434 in words is "twenty-one trillion, thirteen billion, five hundred three million, two hundred twenty-one thousand, four hundred thirty-four".