131344123121 has 4 divisors (see below), whose sum is σ = 131344931700. Its totient is φ = 131343314544.

The previous prime is 131344123091. The next prime is 131344123151. The reversal of 131344123121 is 121321443131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (131344123091) and next prime (131344123151).

It can be written as a sum of positive squares in 2 ways, for example, as 23428588096 + 107915535025 = 153064^2 + 328505^2 .

It is a cyclic number.

It is not a de Polignac number, because 131344123121 - 2¹⁰ = 131344122097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131344123151) 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, 66626 + ... + 516843.

It is an arithmetic number, because the mean of its divisors is an integer number (32836232925).

Almost surely, 2^131344123121 is an apocalyptic number.

It is an amenable number.

131344123121 is a deficient number, since it is larger than the sum of its proper divisors (808579).

131344123121 is an equidigital number, since it uses as much as digits as its factorization.

131344123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808578.

The product of its digits is 1728, while the sum is 26.

Adding to 131344123121 its reverse (121321443131), we get a palindrome (252665566252).

The spelling of 131344123121 in words is "one hundred thirty-one billion, three hundred forty-four million, one hundred twenty-three thousand, one hundred twenty-one".