20020110212161 has 2 divisors, whose sum is σ = 20020110212162. Its totient is φ = 20020110212160.

The previous prime is 20020110212129. The next prime is 20020110212237. The reversal of 20020110212161 is 16121201102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19941306493761 + 78803718400 = 4465569^2 + 280720^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020110212161 - 2⁵ = 20020110212129 is a prime.

It is not a weakly prime, because it can be changed into another prime (20020110212101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010055106080 + 10010055106081.

It is an arithmetic number, because the mean of its divisors is an integer number (10010055106081).

Almost surely, 2^{20020110212161} is an apocalyptic number.

It is an amenable number.

20020110212161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020110212161 is an equidigital number, since it uses as much as digits as its factorization.

20020110212161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20020110212161 its reverse (16121201102002), we get a palindrome (36141311314163).

The spelling of 20020110212161 in words is "twenty trillion, twenty billion, one hundred ten million, two hundred twelve thousand, one hundred sixty-one".