131221103201 has 4 divisors (see below), whose sum is σ = 132802080432. Its totient is φ = 129640125972.

The previous prime is 131221103197. The next prime is 131221103239. The reversal of 131221103201 is 102301122131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 102301122131 = 13 ⋅7869317087.

It is a cyclic number.

It is not a de Polignac number, because 131221103201 - 2² = 131221103197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131221103201.

It is not an unprimeable number, because it can be changed into a prime (131281103201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790488491 + ... + 790488656.

It is an arithmetic number, because the mean of its divisors is an integer number (33200520108).

Almost surely, 2^131221103201 is an apocalyptic number.

It is an amenable number.

131221103201 is a deficient number, since it is larger than the sum of its proper divisors (1580977231).

131221103201 is an equidigital number, since it uses as much as digits as its factorization.

131221103201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580977230.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131221103201 its reverse (102301122131), we get a palindrome (233522225332).

The spelling of 131221103201 in words is "one hundred thirty-one billion, two hundred twenty-one million, one hundred three thousand, two hundred one".