20113231321197 has 96 divisors (see below), whose sum is σ = 34896476160000. Its totient is φ = 10920922191360.

The previous prime is 20113231321189. The next prime is 20113231321219. The reversal of 20113231321197 is 79112313231102.

20113231321197 is a `hidden beast` number, since 2 + 0 + 1 + 1 + 323 + 1 + 321 + 1 + 9 + 7 = 666.

It is not a de Polignac number, because 20113231321197 - 2³ = 20113231321189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113231326197) 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 in 95 ways as a sum of consecutive naturals, for example, 96571429 + ... + 96779477.

It is an arithmetic number, because the mean of its divisors is an integer number (363504960000).

Almost surely, 2^{20113231321197} is an apocalyptic number.

It is an amenable number.

20113231321197 is a deficient number, since it is larger than the sum of its proper divisors (14783244838803).

20113231321197 is a wasteful number, since it uses less digits than its factorization.

20113231321197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208991 (or 208988 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

Adding to 20113231321197 its reverse (79112313231102), we get a palindrome (99225544552299).

The spelling of 20113231321197 in words is "twenty trillion, one hundred thirteen billion, two hundred thirty-one million, three hundred twenty-one thousand, one hundred ninety-seven".