13121001331 has 4 divisors (see below), whose sum is σ = 13241377600. Its totient is φ = 13000625064.

The previous prime is 13121001329. The next prime is 13121001371. The reversal of 13121001331 is 13310012131.

13121001331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13121001331 - 2¹ = 13121001329 is a prime.

It is a super-2 number, since 2×13121001331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121001371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60187971 + ... + 60188188.

It is an arithmetic number, because the mean of its divisors is an integer number (3310344400).

Almost surely, 2^13121001331 is an apocalyptic number.

13121001331 is a deficient number, since it is larger than the sum of its proper divisors (120376269).

13121001331 is a wasteful number, since it uses less digits than its factorization.

13121001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120376268.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 13121001331 its reverse (13310012131), we get a palindrome (26431013462).

The spelling of 13121001331 in words is "thirteen billion, one hundred twenty-one million, one thousand, three hundred thirty-one".