20020121222117 has 2 divisors, whose sum is σ = 20020121222118. Its totient is φ = 20020121222116.

The previous prime is 20020121222063. The next prime is 20020121222147. The reversal of 20020121222117 is 71122212102002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14818296098116 + 5201825124001 = 3849454^2 + 2280751^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020121222117 - 2²⁶ = 20020054113253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020121222092 and 20020121222101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020121222147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010060611058 + 10010060611059.

It is an arithmetic number, because the mean of its divisors is an integer number (10010060611059).

Almost surely, 2^{20020121222117} is an apocalyptic number.

It is an amenable number.

20020121222117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020121222117 is an equidigital number, since it uses as much as digits as its factorization.

20020121222117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 20020121222117 its reverse (71122212102002), we get a palindrome (91142333324119).

The spelling of 20020121222117 in words is "twenty trillion, twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred seventeen".