13121333333331 has 16 divisors (see below), whose sum is σ = 17506070574720. Its totient is φ = 8742076297920.

The previous prime is 13121333333321. The next prime is 13121333333333. The reversal of 13121333333331 is 13333333312131.

It is not a de Polignac number, because 13121333333331 - 2⁷ = 13121333333203 is a prime.

It is a super-2 number, since 2×13121333333331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13121333333292 and 13121333333301.

It is not an unprimeable number, because it can be changed into a prime (13121333333333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149128191 + ... + 149216151.

It is an arithmetic number, because the mean of its divisors is an integer number (1094129410920).

Almost surely, 2^{13121333333331} is an apocalyptic number.

13121333333331 is a deficient number, since it is larger than the sum of its proper divisors (4384737241389).

13121333333331 is a wasteful number, since it uses less digits than its factorization.

13121333333331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118546.

The product of its digits is 39366, while the sum is 33.

Adding to 13121333333331 its reverse (13333333312131), we get a palindrome (26454666645462).

It can be divided in two parts, 1312133 and 3333331, that added together give a palindrome (4645464).

The spelling of 13121333333331 in words is "thirteen trillion, one hundred twenty-one billion, three hundred thirty-three million, three hundred thirty-three thousand, three hundred thirty-one".