13231142161 has 4 divisors (see below), whose sum is σ = 13512655872. Its totient is φ = 12949628452.

The previous prime is 13231142101. The next prime is 13231142189. The reversal of 13231142161 is 16124113231.

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 an emirpimes, since its reverse is a distinct semiprime: 16124113231 = 191 ⋅84419441.

It is a cyclic number.

It is not a de Polignac number, because 13231142161 - 2¹³ = 13231133969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13231142101) 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, 140756785 + ... + 140756878.

It is an arithmetic number, because the mean of its divisors is an integer number (3378163968).

Almost surely, 2^13231142161 is an apocalyptic number.

It is an amenable number.

13231142161 is a deficient number, since it is larger than the sum of its proper divisors (281513711).

13231142161 is an equidigital number, since it uses as much as digits as its factorization.

13231142161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281513710.

The product of its digits is 864, while the sum is 25.

Adding to 13231142161 its reverse (16124113231), we get a palindrome (29355255392).

The spelling of 13231142161 in words is "thirteen billion, two hundred thirty-one million, one hundred forty-two thousand, one hundred sixty-one".