102020102161 has 2 divisors, whose sum is σ = 102020102162. Its totient is φ = 102020102160.

The previous prime is 102020102117. The next prime is 102020102189. The reversal of 102020102161 is 161201020201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58288927761 + 43731174400 = 241431^2 + 209120^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020102161 - 2⁷ = 102020102033 is a prime.

It is not a weakly prime, because it can be changed into another prime (102020103161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010051080 + 51010051081.

It is an arithmetic number, because the mean of its divisors is an integer number (51010051081).

Almost surely, 2^102020102161 is an apocalyptic number.

It is an amenable number.

102020102161 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020102161 is an equidigital number, since it uses as much as digits as its factorization.

102020102161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 102020102161 its reverse (161201020201), we get a palindrome (263221122362).

The spelling of 102020102161 in words is "one hundred two billion, twenty million, one hundred two thousand, one hundred sixty-one".