131111321521445 has 8 divisors (see below), whose sum is σ = 157334408675736. Its totient is φ = 104888508650496.

The previous prime is 131111321521429. The next prime is 131111321521487. The reversal of 131111321521445 is 544125123111131.

It can be written as a sum of positive squares in 4 ways, for example, as 9630849496321 + 121480472025124 = 3103361^2 + 11021818^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131111321521445 - 2⁴ = 131111321521429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67517732 + ... + 69432461.

It is an arithmetic number, because the mean of its divisors is an integer number (19666801084467).

Almost surely, 2^{131111321521445} is an apocalyptic number.

It is an amenable number.

131111321521445 is a deficient number, since it is larger than the sum of its proper divisors (26223087154291).

131111321521445 is a wasteful number, since it uses less digits than its factorization.

131111321521445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137141671.

The product of its digits is 14400, while the sum is 35.

Adding to 131111321521445 its reverse (544125123111131), we get a palindrome (675236444632576).

The spelling of 131111321521445 in words is "one hundred thirty-one trillion, one hundred eleven billion, three hundred twenty-one million, five hundred twenty-one thousand, four hundred forty-five".