131211221301201 has 4 divisors (see below), whose sum is σ = 174948295068272. Its totient is φ = 87474147534132.

The previous prime is 131211221301151. The next prime is 131211221301221. The reversal of 131211221301201 is 102103122112131.

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 not a de Polignac number, because 131211221301201 - 2¹⁰ = 131211221300177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131211221301221) 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 3 ways as a sum of consecutive naturals, for example, 21868536883531 + ... + 21868536883536.

It is an arithmetic number, because the mean of its divisors is an integer number (43737073767068).

Almost surely, 2^{131211221301201} is an apocalyptic number.

It is an amenable number.

131211221301201 is a deficient number, since it is larger than the sum of its proper divisors (43737073767071).

131211221301201 is an equidigital number, since it uses as much as digits as its factorization.

131211221301201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43737073767070.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 131211221301201 its reverse (102103122112131), we get a palindrome (233314343413332).

The spelling of 131211221301201 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred twenty-one million, three hundred one thousand, two hundred one".