131201431400421 has 96 divisors (see below), whose sum is σ = 203442613920000. Its totient is φ = 81240893927424.

The previous prime is 131201431400407. The next prime is 131201431400441. The reversal of 131201431400421 is 124004134102131.

It is a happy number.

131201431400421 is a `hidden beast` number, since 1 + 3 + 1 + 201 + 4 + 31 + 4 + 0 + 0 + 421 = 666.

It is not a de Polignac number, because 131201431400421 - 2⁶ = 131201431400357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131201431400441) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 755799391 + ... + 755972963.

It is an arithmetic number, because the mean of its divisors is an integer number (2119193895000).

Almost surely, 2^{131201431400421} is an apocalyptic number.

It is an amenable number.

131201431400421 is a deficient number, since it is larger than the sum of its proper divisors (72241182519579).

131201431400421 is a wasteful number, since it uses less digits than its factorization.

131201431400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174123 (or 174120 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 131201431400421 its reverse (124004134102131), we get a palindrome (255205565502552).

The spelling of 131201431400421 in words is "one hundred thirty-one trillion, two hundred one billion, four hundred thirty-one million, four hundred thousand, four hundred twenty-one".