131404322521121 has 16 divisors (see below), whose sum is σ = 141807231912528. Its totient is φ = 121043784576000.

The previous prime is 131404322521093. The next prime is 131404322521123. The reversal of 131404322521121 is 121125223404131.

It can be written as a sum of positive squares in 8 ways, for example, as 109208540183521 + 22195782337600 = 10450289^2 + 4711240^2 .

It is a de Polignac number, because none of the positive numbers 2^k-131404322521121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131404322521123) 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, 7766045 + ... + 17975541.

It is an arithmetic number, because the mean of its divisors is an integer number (8862951994533).

Almost surely, 2^{131404322521121} is an apocalyptic number.

It is an amenable number.

131404322521121 is a deficient number, since it is larger than the sum of its proper divisors (10402909391407).

131404322521121 is a wasteful number, since it uses less digits than its factorization.

131404322521121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10211572.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 131404322521121 its reverse (121125223404131), we get a palindrome (252529545925252).

The spelling of 131404322521121 in words is "one hundred thirty-one trillion, four hundred four billion, three hundred twenty-two million, five hundred twenty-one thousand, one hundred twenty-one".