20010110161 has 2 divisors, whose sum is σ = 20010110162. Its totient is φ = 20010110160.

The previous prime is 20010110137. The next prime is 20010110189. The reversal of 20010110161 is 16101101002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12900416400 + 7109693761 = 113580^2 + 84319^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010110161 - 2¹⁷ = 20009979089 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010110191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005055080 + 10005055081.

It is an arithmetic number, because the mean of its divisors is an integer number (10005055081).

Almost surely, 2^20010110161 is an apocalyptic number.

It is an amenable number.

20010110161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010110161 is an equidigital number, since it uses as much as digits as its factorization.

20010110161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20010110161 its reverse (16101101002), we get a palindrome (36111211163).

The spelling of 20010110161 in words is "twenty billion, ten million, one hundred ten thousand, one hundred sixty-one".