121202020100081 has 2 divisors, whose sum is σ = 121202020100082. Its totient is φ = 121202020100080.

The previous prime is 121202020100071. The next prime is 121202020100167. The reversal of 121202020100081 is 180001020202121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75815053209856 + 45386966890225 = 8707184^2 + 6736985^2 .

It is a cyclic number.

It is not a de Polignac number, because 121202020100081 - 2⁶ = 121202020100017 is a prime.

It is a super-2 number, since 2×121202020100081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121202020100071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601010050040 + 60601010050041.

It is an arithmetic number, because the mean of its divisors is an integer number (60601010050041).

Almost surely, 2^{121202020100081} is an apocalyptic number.

It is an amenable number.

121202020100081 is a deficient number, since it is larger than the sum of its proper divisors (1).

121202020100081 is an equidigital number, since it uses as much as digits as its factorization.

121202020100081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 121202020100081 in words is "one hundred twenty-one trillion, two hundred two billion, twenty million, one hundred thousand, eighty-one".