13433445121 has 4 divisors (see below), whose sum is σ = 13435460100. Its totient is φ = 13431430144.

The previous prime is 13433445073. The next prime is 13433445131. The reversal of 13433445121 is 12154433431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12773520400 + 659924721 = 113020^2 + 25689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13433445121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13433445131) 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, 997456 + ... + 1010833.

It is an arithmetic number, because the mean of its divisors is an integer number (3358865025).

Almost surely, 2^13433445121 is an apocalyptic number.

It is an amenable number.

13433445121 is a deficient number, since it is larger than the sum of its proper divisors (2014979).

13433445121 is an equidigital number, since it uses as much as digits as its factorization.

13433445121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014978.

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

Adding to 13433445121 its reverse (12154433431), we get a palindrome (25587878552).

The spelling of 13433445121 in words is "thirteen billion, four hundred thirty-three million, four hundred forty-five thousand, one hundred twenty-one".