20116160420021 has 2 divisors, whose sum is σ = 20116160420022. Its totient is φ = 20116160420020.

The previous prime is 20116160420009. The next prime is 20116160420047. The reversal of 20116160420021 is 12002406161102.

It is an a-pointer prime, because the next prime (20116160420047) can be obtained adding 20116160420021 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19931358447025 + 184801972996 = 4464455^2 + 429886^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116160420021 - 2¹⁴ = 20116160403637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20116160420921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058080210010 + 10058080210011.

It is an arithmetic number, because the mean of its divisors is an integer number (10058080210011).

Almost surely, 2^{20116160420021} is an apocalyptic number.

It is an amenable number.

20116160420021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116160420021 is an equidigital number, since it uses as much as digits as its factorization.

20116160420021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 20116160420021 its reverse (12002406161102), we get a palindrome (32118566581123).

The spelling of 20116160420021 in words is "twenty trillion, one hundred sixteen billion, one hundred sixty million, four hundred twenty thousand, twenty-one".