131301434400221 has 4 divisors (see below), whose sum is σ = 131562471049632. Its totient is φ = 131040397750812.

The previous prime is 131301434400197. The next prime is 131301434400229. The reversal of 131301434400221 is 122004434103131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131301434400221 - 2²² = 131301430205917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131301434400229) 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, 130518323951 + ... + 130518324956.

It is an arithmetic number, because the mean of its divisors is an integer number (32890617762408).

Almost surely, 2^{131301434400221} is an apocalyptic number.

It is an amenable number.

131301434400221 is a deficient number, since it is larger than the sum of its proper divisors (261036649411).

131301434400221 is an equidigital number, since it uses as much as digits as its factorization.

131301434400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261036649410.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 131301434400221 its reverse (122004434103131), we get a palindrome (253305868503352).

The spelling of 131301434400221 in words is "one hundred thirty-one trillion, three hundred one billion, four hundred thirty-four million, four hundred thousand, two hundred twenty-one".