13203305531121 has 4 divisors (see below), whose sum is σ = 17604407374832. Its totient is φ = 8802203687412.

The previous prime is 13203305531081. The next prime is 13203305531177. The reversal of 13203305531121 is 12113550330231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13203305531121 - 2⁹ = 13203305530609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13203305536121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2200550921851 + ... + 2200550921856.

It is an arithmetic number, because the mean of its divisors is an integer number (4401101843708).

Almost surely, 2^{13203305531121} is an apocalyptic number.

It is an amenable number.

13203305531121 is a deficient number, since it is larger than the sum of its proper divisors (4401101843711).

13203305531121 is an equidigital number, since it uses as much as digits as its factorization.

13203305531121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4401101843710.

The product of its (nonzero) digits is 8100, while the sum is 30.

Adding to 13203305531121 its reverse (12113550330231), we get a palindrome (25316855861352).

The spelling of 13203305531121 in words is "thirteen trillion, two hundred three billion, three hundred five million, five hundred thirty-one thousand, one hundred twenty-one".