13121111322131 has 4 divisors (see below), whose sum is σ = 13194413620200. Its totient is φ = 13047809024064.

The previous prime is 13121111322119. The next prime is 13121111322139. The reversal of 13121111322131 is 13122311112131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13121111322131 is a prime.

It is a super-2 number, since 2×13121111322131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121111322097 and 13121111322106.

It is not an unprimeable number, because it can be changed into a prime (13121111322139) 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, 36651148766 + ... + 36651149123.

It is an arithmetic number, because the mean of its divisors is an integer number (3298603405050).

Almost surely, 2^{13121111322131} is an apocalyptic number.

13121111322131 is a deficient number, since it is larger than the sum of its proper divisors (73302298069).

13121111322131 is an equidigital number, since it uses as much as digits as its factorization.

13121111322131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73302298068.

The product of its digits is 216, while the sum is 23.

Adding to 13121111322131 its reverse (13122311112131), we get a palindrome (26243422434262).

The spelling of 13121111322131 in words is "thirteen trillion, one hundred twenty-one billion, one hundred eleven million, three hundred twenty-two thousand, one hundred thirty-one".