131343444010021 has 4 divisors (see below), whose sum is σ = 131916996167500. Its totient is φ = 130769891852544.

The previous prime is 131343444009983. The next prime is 131343444010043. The reversal of 131343444010021 is 120010444343131.

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 115026804753025 + 16316639256996 = 10725055^2 + 4039386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131343444010021 is a prime.

It is a super-2 number, since 2×131343444010021² (a number of 29 digits) contains 22 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 (131343444080021) 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, 286776078396 + ... + 286776078853.

It is an arithmetic number, because the mean of its divisors is an integer number (32979249041875).

Almost surely, 2^{131343444010021} is an apocalyptic number.

It is an amenable number.

131343444010021 is a deficient number, since it is larger than the sum of its proper divisors (573552157479).

131343444010021 is an equidigital number, since it uses as much as digits as its factorization.

131343444010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573552157478.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 131343444010021 its reverse (120010444343131), we get a palindrome (251353888353152).

The spelling of 131343444010021 in words is "one hundred thirty-one trillion, three hundred forty-three billion, four hundred forty-four million, ten thousand, twenty-one".