131201221203101 has 4 divisors (see below), whose sum is σ = 149944252803552. Its totient is φ = 112458189602652.

The previous prime is 131201221203047. The next prime is 131201221203149. The reversal of 131201221203101 is 101302122102131.

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 131201221203101 - 2³⁸ = 130926343296157 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 (131201221203001) 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, 9371515800215 + ... + 9371515800228.

It is an arithmetic number, because the mean of its divisors is an integer number (37486063200888).

Almost surely, 2^{131201221203101} is an apocalyptic number.

It is an amenable number.

131201221203101 is a deficient number, since it is larger than the sum of its proper divisors (18743031600451).

131201221203101 is an equidigital number, since it uses as much as digits as its factorization.

131201221203101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18743031600450.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 131201221203101 its reverse (101302122102131), we get a palindrome (232503343305232).

The spelling of 131201221203101 in words is "one hundred thirty-one trillion, two hundred one billion, two hundred twenty-one million, two hundred three thousand, one hundred one".