13142231211521 has 4 divisors (see below), whose sum is σ = 13142239783344. Its totient is φ = 13142222639700.

The previous prime is 13142231211463. The next prime is 13142231211533. The reversal of 13142231211521 is 12511213224131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13142231211521 - 2⁶ = 13142231211457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13142231211121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286375 + ... + 5285756.

It is an arithmetic number, because the mean of its divisors is an integer number (3285559945836).

Almost surely, 2^{13142231211521} is an apocalyptic number.

It is an amenable number.

13142231211521 is a deficient number, since it is larger than the sum of its proper divisors (8571823).

13142231211521 is an equidigital number, since it uses as much as digits as its factorization.

13142231211521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8571822.

The product of its digits is 2880, while the sum is 29.

Adding to 13142231211521 its reverse (12511213224131), we get a palindrome (25653444435652).

The spelling of 13142231211521 in words is "thirteen trillion, one hundred forty-two billion, two hundred thirty-one million, two hundred eleven thousand, five hundred twenty-one".