131221122430201 has 2 divisors, whose sum is σ = 131221122430202. Its totient is φ = 131221122430200.

The previous prime is 131221122430171. The next prime is 131221122430319. The reversal of 131221122430201 is 102034221122131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131212328492025 + 8793938176 = 11454795^2 + 93776^2 .

It is a cyclic number.

It is not a de Polignac number, because 131221122430201 - 2⁹ = 131221122429689 is a prime.

It is a super-2 number, since 2×131221122430201² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131221122437201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65610561215100 + 65610561215101.

It is an arithmetic number, because the mean of its divisors is an integer number (65610561215101).

Almost surely, 2^{131221122430201} is an apocalyptic number.

It is an amenable number.

131221122430201 is a deficient number, since it is larger than the sum of its proper divisors (1).

131221122430201 is an equidigital number, since it uses as much as digits as its factorization.

131221122430201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 131221122430201 its reverse (102034221122131), we get a palindrome (233255343552332).

The spelling of 131221122430201 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, one hundred twenty-two million, four hundred thirty thousand, two hundred one".