20450122420129 has 2 divisors, whose sum is σ = 20450122420130. Its totient is φ = 20450122420128.

The previous prime is 20450122420073. The next prime is 20450122420163. The reversal of 20450122420129 is 92102422105402.

It is an a-pointer prime, because the next prime (20450122420163) can be obtained adding 20450122420129 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14105643039504 + 6344479380625 = 3755748^2 + 2518825^2 .

It is a cyclic number.

It is not a de Polignac number, because 20450122420129 - 2¹¹ = 20450122418081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20450122420094 and 20450122420103.

It is not a weakly prime, because it can be changed into another prime (20450122420529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10225061210064 + 10225061210065.

It is an arithmetic number, because the mean of its divisors is an integer number (10225061210065).

Almost surely, 2^{20450122420129} is an apocalyptic number.

It is an amenable number.

20450122420129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20450122420129 is an equidigital number, since it uses as much as digits as its factorization.

20450122420129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 20450122420129 in words is "twenty trillion, four hundred fifty billion, one hundred twenty-two million, four hundred twenty thousand, one hundred twenty-nine".