13121511312343 has 16 divisors (see below), whose sum is σ = 15648131713536. Its totient is φ = 10757927996640.

The previous prime is 13121511312313. The next prime is 13121511312361. The reversal of 13121511312343 is 34321311512131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13121511312343 - 2⁵ = 13121511312311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121511312313) 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, 30798805 + ... + 31221937.

It is an arithmetic number, because the mean of its divisors is an integer number (978008232096).

Almost surely, 2^{13121511312343} is an apocalyptic number.

13121511312343 is a deficient number, since it is larger than the sum of its proper divisors (2526620401193).

13121511312343 is a wasteful number, since it uses less digits than its factorization.

13121511312343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615774.

The product of its digits is 6480, while the sum is 31.

Adding to 13121511312343 its reverse (34321311512131), we get a palindrome (47442822824474).

The spelling of 13121511312343 in words is "thirteen trillion, one hundred twenty-one billion, five hundred eleven million, three hundred twelve thousand, three hundred forty-three".