131201313333221 has 4 divisors (see below), whose sum is σ = 131208482430444. Its totient is φ = 131194144236000.

The previous prime is 131201313333217. The next prime is 131201313333239. The reversal of 131201313333221 is 122333313102131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5177923005025 + 126023390328196 = 2275505^2 + 11226014^2 .

It is a cyclic number.

It is not a de Polignac number, because 131201313333221 - 2² = 131201313333217 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 (131201313333241) 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, 3584521160 + ... + 3584557761.

It is an arithmetic number, because the mean of its divisors is an integer number (32802120607611).

Almost surely, 2^{131201313333221} is an apocalyptic number.

It is an amenable number.

131201313333221 is a deficient number, since it is larger than the sum of its proper divisors (7169097223).

131201313333221 is an equidigital number, since it uses as much as digits as its factorization.

131201313333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7169097222.

The product of its (nonzero) digits is 5832, while the sum is 29.

Adding to 131201313333221 its reverse (122333313102131), we get a palindrome (253534626435352).

The spelling of 131201313333221 in words is "one hundred thirty-one trillion, two hundred one billion, three hundred thirteen million, three hundred thirty-three thousand, two hundred twenty-one".