13221513235500 has 96 divisors (see below), whose sum is σ = 39828668967360. Its totient is φ = 3404159718400.

The previous prime is 13221513235477. The next prime is 13221513235531. The reversal of 13221513235500 is 553231512231.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151927917 + ... + 152014916.

It is an arithmetic number, because the mean of its divisors is an integer number (414881968410).

Almost surely, 2^{13221513235500} is an apocalyptic number.

13221513235500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13221513235500 is an abundant number, since it is smaller than the sum of its proper divisors (26607155731860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221513235500 is a wasteful number, since it uses less digits than its factorization.

13221513235500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303942884 (or 303942872 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

Adding to 13221513235500 its reverse (553231512231), we get a palindrome (13774744747731).

The spelling of 13221513235500 in words is "thirteen trillion, two hundred twenty-one billion, five hundred thirteen million, two hundred thirty-five thousand, five hundred".