131233142233421 has 4 divisors (see below), whose sum is σ = 131233200489372. Its totient is φ = 131233083977472.

The previous prime is 131233142233399. The next prime is 131233142233423. The reversal of 131233142233421 is 124332241332131.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36852014383396 + 94381127850025 = 6070586^2 + 9714995^2 .

It is a cyclic number.

It is not a de Polignac number, because 131233142233421 - 2²² = 131233138039117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131233142233423) 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, 25607060 + ... + 30301613.

It is an arithmetic number, because the mean of its divisors is an integer number (32808300122343).

Almost surely, 2^{131233142233421} is an apocalyptic number.

It is an amenable number.

131233142233421 is a deficient number, since it is larger than the sum of its proper divisors (58255951).

131233142233421 is an equidigital number, since it uses as much as digits as its factorization.

131233142233421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58255950.

The product of its digits is 62208, while the sum is 35.

Adding to 131233142233421 its reverse (124332241332131), we get a palindrome (255565383565552).

The spelling of 131233142233421 in words is "one hundred thirty-one trillion, two hundred thirty-three billion, one hundred forty-two million, two hundred thirty-three thousand, four hundred twenty-one".