131222200121 has 2 divisors, whose sum is σ = 131222200122. Its totient is φ = 131222200120.

The previous prime is 131222200063. The next prime is 131222200171. The reversal of 131222200121 is 121002222131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131134515625 + 87684496 = 362125^2 + 9364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131222200121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131222200121.

It is not a weakly prime, because it can be changed into another prime (131222200171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65611100060 + 65611100061.

It is an arithmetic number, because the mean of its divisors is an integer number (65611100061).

Almost surely, 2^131222200121 is an apocalyptic number.

It is an amenable number.

131222200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131222200121 is an equidigital number, since it uses as much as digits as its factorization.

131222200121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 131222200121 its reverse (121002222131), we get a palindrome (252224422252).

The spelling of 131222200121 in words is "one hundred thirty-one billion, two hundred twenty-two million, two hundred thousand, one hundred twenty-one".