13003231121 has 4 divisors (see below), whose sum is σ = 13003490544. Its totient is φ = 13002971700.

The previous prime is 13003231117. The next prime is 13003231141. The reversal of 13003231121 is 12113230031.

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 a cyclic number.

It is not a de Polignac number, because 13003231121 - 2² = 13003231117 is a prime.

It is a super-2 number, since 2×13003231121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13003231121.

It is not an unprimeable number, because it can be changed into a prime (13003231141) 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, 27875 + ... + 163656.

It is an arithmetic number, because the mean of its divisors is an integer number (3250872636).

Almost surely, 2^13003231121 is an apocalyptic number.

It is an amenable number.

13003231121 is a deficient number, since it is larger than the sum of its proper divisors (259423).

13003231121 is an equidigital number, since it uses as much as digits as its factorization.

13003231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259422.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13003231121 its reverse (12113230031), we get a palindrome (25116461152).

The spelling of 13003231121 in words is "thirteen billion, three million, two hundred thirty-one thousand, one hundred twenty-one".