13021521434434 has 32 divisors (see below), whose sum is σ = 20139048288000. Its totient is φ = 6311764353024.

The previous prime is 13021521434393. The next prime is 13021521434477. The reversal of 13021521434434 is 43443412512031.

It is a junction number, because it is equal to n+sod(n) for n = 13021521434393 and 13021521434402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6885442 + ... + 8570434.

It is an arithmetic number, because the mean of its divisors is an integer number (629345259000).

Almost surely, 2^{13021521434434} is an apocalyptic number.

13021521434434 is a deficient number, since it is larger than the sum of its proper divisors (7117526853566).

13021521434434 is a wasteful number, since it uses less digits than its factorization.

13021521434434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685962.

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 13021521434434 its reverse (43443412512031), we get a palindrome (56464933946465).

The spelling of 13021521434434 in words is "thirteen trillion, twenty-one billion, five hundred twenty-one million, four hundred thirty-four thousand, four hundred thirty-four".