20131023211297 has 2 divisors, whose sum is σ = 20131023211298. Its totient is φ = 20131023211296.

The previous prime is 20131023211237. The next prime is 20131023211331. The reversal of 20131023211297 is 79211232013102.

It is an a-pointer prime, because the next prime (20131023211331) can be obtained adding 20131023211297 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15228093577761 + 4902929633536 = 3902319^2 + 2214256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20131023211297 is a prime.

It is not a weakly prime, because it can be changed into another prime (20131023211237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065511605648 + 10065511605649.

It is an arithmetic number, because the mean of its divisors is an integer number (10065511605649).

Almost surely, 2^{20131023211297} is an apocalyptic number.

It is an amenable number.

20131023211297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131023211297 is an equidigital number, since it uses as much as digits as its factorization.

20131023211297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

Adding to 20131023211297 its reverse (79211232013102), we get a palindrome (99342255224399).

The spelling of 20131023211297 in words is "twenty trillion, one hundred thirty-one billion, twenty-three million, two hundred eleven thousand, two hundred ninety-seven".