2102110202161 has 2 divisors, whose sum is σ = 2102110202162. Its totient is φ = 2102110202160.

The previous prime is 2102110202077. The next prime is 2102110202189. The reversal of 2102110202161 is 1612020112012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1453336335936 + 648773866225 = 1205544^2 + 805465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102110202161 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102110212161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051055101080 + 1051055101081.

It is an arithmetic number, because the mean of its divisors is an integer number (1051055101081).

Almost surely, 2^{2102110202161} is an apocalyptic number.

It is an amenable number.

2102110202161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102110202161 is an equidigital number, since it uses as much as digits as its factorization.

2102110202161 is an evil number, because the sum of its binary digits is even.

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

Adding to 2102110202161 its reverse (1612020112012), we get a palindrome (3714130314173).

The spelling of 2102110202161 in words is "two trillion, one hundred two billion, one hundred ten million, two hundred two thousand, one hundred sixty-one".