131403021333421 has 4 divisors (see below), whose sum is σ = 131403230626492. Its totient is φ = 131402812040352.

The previous prime is 131403021333391. The next prime is 131403021333439. The reversal of 131403021333421 is 124333120304131.

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 39489787128100 + 91913234205321 = 6284090^2 + 9587139^2 .

It is a cyclic number.

It is not a de Polignac number, because 131403021333421 - 2⁹ = 131403021332909 is a prime.

It is a super-3 number, since 3×131403021333421³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131403021333121) 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, 103701930 + ... + 104961403.

It is an arithmetic number, because the mean of its divisors is an integer number (32850807656623).

Almost surely, 2^{131403021333421} is an apocalyptic number.

It is an amenable number.

131403021333421 is a deficient number, since it is larger than the sum of its proper divisors (209293071).

131403021333421 is an equidigital number, since it uses as much as digits as its factorization.

131403021333421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209293070.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 131403021333421 its reverse (124333120304131), we get a palindrome (255736141637552).

The spelling of 131403021333421 in words is "one hundred thirty-one trillion, four hundred three billion, twenty-one million, three hundred thirty-three thousand, four hundred twenty-one".