13121313231133 has 4 divisors (see below), whose sum is σ = 13121325245340. Its totient is φ = 13121301216928.

The previous prime is 13121313231119. The next prime is 13121313231139. The reversal of 13121313231133 is 33113231312131.

It is a happy number.

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 7489866244644 + 5631446986489 = 2736762^2 + 2373067^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121313231133 - 2²¹ = 13121311133981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121313231139) 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, 4184560 + ... + 6614617.

It is an arithmetic number, because the mean of its divisors is an integer number (3280331311335).

Almost surely, 2^{13121313231133} is an apocalyptic number.

It is an amenable number.

13121313231133 is a deficient number, since it is larger than the sum of its proper divisors (12014207).

13121313231133 is a wasteful number, since it uses less digits than its factorization.

13121313231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12014206.

The product of its digits is 2916, while the sum is 28.

Adding to 13121313231133 its reverse (33113231312131), we get a palindrome (46234544543264).

The spelling of 13121313231133 in words is "thirteen trillion, one hundred twenty-one billion, three hundred thirteen million, two hundred thirty-one thousand, one hundred thirty-three".