20020101000161 has 2 divisors, whose sum is σ = 20020101000162. Its totient is φ = 20020101000160.

The previous prime is 20020101000157. The next prime is 20020101000241. The reversal of 20020101000161 is 16100010102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19926804963025 + 93296037136 = 4463945^2 + 305444^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020101000161 - 2² = 20020101000157 is a prime.

It is not a weakly prime, because it can be changed into another prime (20020101000131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010050500080 + 10010050500081.

It is an arithmetic number, because the mean of its divisors is an integer number (10010050500081).

Almost surely, 2^{20020101000161} is an apocalyptic number.

It is an amenable number.

20020101000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020101000161 is an equidigital number, since it uses as much as digits as its factorization.

20020101000161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20020101000161 its reverse (16100010102002), we get a palindrome (36120111102163).

The spelling of 20020101000161 in words is "twenty trillion, twenty billion, one hundred one million, one hundred sixty-one", and thus it is an aban number.