20010102110197 has 2 divisors, whose sum is σ = 20010102110198. Its totient is φ = 20010102110196.

The previous prime is 20010102110171. The next prime is 20010102110227. The reversal of 20010102110197 is 79101120101002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16847363538916 + 3162738571281 = 4104554^2 + 1778409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010102110197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010102410197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005051055098 + 10005051055099.

It is an arithmetic number, because the mean of its divisors is an integer number (10005051055099).

Almost surely, 2^{20010102110197} is an apocalyptic number.

It is an amenable number.

20010102110197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010102110197 is an equidigital number, since it uses as much as digits as its factorization.

20010102110197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 25.

Adding to 20010102110197 its reverse (79101120101002), we get a palindrome (99111222211199).

The spelling of 20010102110197 in words is "twenty trillion, ten billion, one hundred two million, one hundred ten thousand, one hundred ninety-seven".