121002202020121 has 2 divisors, whose sum is σ = 121002202020122. Its totient is φ = 121002202020120.

The previous prime is 121002202020109. The next prime is 121002202020143. The reversal of 121002202020121 is 121020202200121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114264875775625 + 6737326244496 = 10689475^2 + 2595636^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002202020121 - 2³³ = 120993612085529 is a prime.

It is a super-2 number, since 2×121002202020121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121002202020095 and 121002202020104.

It is not a weakly prime, because it can be changed into another prime (121002202020421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501101010060 + 60501101010061.

It is an arithmetic number, because the mean of its divisors is an integer number (60501101010061).

Almost surely, 2^{121002202020121} is an apocalyptic number.

It is an amenable number.

121002202020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002202020121 is an equidigital number, since it uses as much as digits as its factorization.

121002202020121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121002202020121 its reverse (121020202200121), we get a palindrome (242022404220242).

The spelling of 121002202020121 in words is "one hundred twenty-one trillion, two billion, two hundred two million, twenty thousand, one hundred twenty-one".