13121151313 has 4 divisors (see below), whose sum is σ = 13187756340. Its totient is φ = 13054546288.

The previous prime is 13121151311. The next prime is 13121151319. The reversal of 13121151313 is 31315112131.

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 12921550929 + 199600384 = 113673^2 + 14128^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121151313 - 2¹ = 13121151311 is a prime.

It is a super-2 number, since 2×13121151313² (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 (13121151311) 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, 33302218 + ... + 33302611.

It is an arithmetic number, because the mean of its divisors is an integer number (3296939085).

Almost surely, 2^13121151313 is an apocalyptic number.

It is an amenable number.

13121151313 is a deficient number, since it is larger than the sum of its proper divisors (66605027).

13121151313 is an equidigital number, since it uses as much as digits as its factorization.

13121151313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66605026.

The product of its digits is 270, while the sum is 22.

Adding to 13121151313 its reverse (31315112131), we get a palindrome (44436263444).

The spelling of 13121151313 in words is "thirteen billion, one hundred twenty-one million, one hundred fifty-one thousand, three hundred thirteen".