20101011201197 has 2 divisors, whose sum is σ = 20101011201198. Its totient is φ = 20101011201196.

The previous prime is 20101011201191. The next prime is 20101011201263. The reversal of 20101011201197 is 79110211010102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18756642839236 + 1344368361961 = 4330894^2 + 1159469^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101011201197 - 2⁶ = 20101011201133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101011201191) 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, 10050505600598 + 10050505600599.

It is an arithmetic number, because the mean of its divisors is an integer number (10050505600599).

Almost surely, 2^{20101011201197} is an apocalyptic number.

It is an amenable number.

20101011201197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101011201197 is an equidigital number, since it uses as much as digits as its factorization.

20101011201197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 26.

Adding to 20101011201197 its reverse (79110211010102), we get a palindrome (99211222211299).

The spelling of 20101011201197 in words is "twenty trillion, one hundred one billion, eleven million, two hundred one thousand, one hundred ninety-seven".