13021521434542 has 8 divisors (see below), whose sum is σ = 19556015182416. Its totient is φ = 6502849707072.

The previous prime is 13021521434533. The next prime is 13021521434567. The reversal of 13021521434542 is 24543412512031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3955503043 + ... + 3955506334.

It is an arithmetic number, because the mean of its divisors is an integer number (2444501897802).

Almost surely, 2^{13021521434542} is an apocalyptic number.

13021521434542 is a deficient number, since it is larger than the sum of its proper divisors (6534493747874).

13021521434542 is an equidigital number, since it uses as much as digits as its factorization.

13021521434542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911010202.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 13021521434542 its reverse (24543412512031), we get a palindrome (37564933946573).

The spelling of 13021521434542 in words is "thirteen trillion, twenty-one billion, five hundred twenty-one million, four hundred thirty-four thousand, five hundred forty-two".