131222231201 has 4 divisors (see below), whose sum is σ = 131223038100. Its totient is φ = 131221424304.

The previous prime is 131222231197. The next prime is 131222231207. The reversal of 131222231201 is 102132222131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 44461939600 + 86760291601 = 210860^2 + 294551^2 .

It is a cyclic number.

It is not a de Polignac number, because 131222231201 - 2² = 131222231197 is a prime.

It is a super-2 number, since 2×131222231201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131222231207) 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, 64706 + ... + 516363.

It is an arithmetic number, because the mean of its divisors is an integer number (32805759525).

Almost surely, 2^131222231201 is an apocalyptic number.

It is an amenable number.

131222231201 is a deficient number, since it is larger than the sum of its proper divisors (806899).

131222231201 is an equidigital number, since it uses as much as digits as its factorization.

131222231201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806898.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131222231201 its reverse (102132222131), we get a palindrome (233354453332).

The spelling of 131222231201 in words is "one hundred thirty-one billion, two hundred twenty-two million, two hundred thirty-one thousand, two hundred one".