121101210200161 has 2 divisors, whose sum is σ = 121101210200162. Its totient is φ = 121101210200160.

The previous prime is 121101210200147. The next prime is 121101210200209. The reversal of 121101210200161 is 161002012101121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91147481200161 + 29953729000000 = 9547119^2 + 5473000^2 .

It is an emirp because it is prime and its reverse (161002012101121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121101210200161 - 2²⁹ = 121100673329249 is a prime.

It is a super-2 number, since 2×121101210200161² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121101210200461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550605100080 + 60550605100081.

It is an arithmetic number, because the mean of its divisors is an integer number (60550605100081).

Almost surely, 2^{121101210200161} is an apocalyptic number.

It is an amenable number.

121101210200161 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101210200161 is an equidigital number, since it uses as much as digits as its factorization.

121101210200161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 121101210200161 its reverse (161002012101121), we get a palindrome (282103222301282).

The spelling of 121101210200161 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred ten million, two hundred thousand, one hundred sixty-one".