131111425521 has 16 divisors (see below), whose sum is σ = 194311224000. Its totient is φ = 87375183264.

The previous prime is 131111425519. The next prime is 131111425541. The reversal of 131111425521 is 125524111131.

131111425521 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 114 + 25 + 521 = 666.

It is not a de Polignac number, because 131111425521 - 2¹ = 131111425519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (131111425541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826716 + ... + 972461.

It is an arithmetic number, because the mean of its divisors is an integer number (12144451500).

Almost surely, 2^131111425521 is an apocalyptic number.

It is an amenable number.

131111425521 is a deficient number, since it is larger than the sum of its proper divisors (63199798479).

131111425521 is a wasteful number, since it uses less digits than its factorization.

131111425521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801885 (or 1801879 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

Adding to 131111425521 its reverse (125524111131), we get a palindrome (256635536652).

The spelling of 131111425521 in words is "one hundred thirty-one billion, one hundred eleven million, four hundred twenty-five thousand, five hundred twenty-one".