131202232121 has 2 divisors, whose sum is σ = 131202232122. Its totient is φ = 131202232120.

The previous prime is 131202232111. The next prime is 131202232159. The reversal of 131202232121 is 121232202131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88840359721 + 42361872400 = 298061^2 + 205820^2 .

It is an emirp because it is prime and its reverse (121232202131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131202232121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131202232093 and 131202232102.

It is not a weakly prime, because it can be changed into another prime (131202232111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65601116060 + 65601116061.

It is an arithmetic number, because the mean of its divisors is an integer number (65601116061).

Almost surely, 2^131202232121 is an apocalyptic number.

It is an amenable number.

131202232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131202232121 is an equidigital number, since it uses as much as digits as its factorization.

131202232121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 131202232121 its reverse (121232202131), we get a palindrome (252434434252).

The spelling of 131202232121 in words is "one hundred thirty-one billion, two hundred two million, two hundred thirty-two thousand, one hundred twenty-one".