20101311323237 has 2 divisors, whose sum is σ = 20101311323238. Its totient is φ = 20101311323236.

The previous prime is 20101311323201. The next prime is 20101311323243. The reversal of 20101311323237 is 73232311310102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12656702755876 + 7444608567361 = 3557626^2 + 2728481^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101311323237 - 2¹⁶ = 20101311257701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101311323257) 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, 10050655661618 + 10050655661619.

It is an arithmetic number, because the mean of its divisors is an integer number (10050655661619).

Almost surely, 2^{20101311323237} is an apocalyptic number.

It is an amenable number.

20101311323237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101311323237 is an equidigital number, since it uses as much as digits as its factorization.

20101311323237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

Adding to 20101311323237 its reverse (73232311310102), we get a palindrome (93333622633339).

The spelling of 20101311323237 in words is "twenty trillion, one hundred one billion, three hundred eleven million, three hundred twenty-three thousand, two hundred thirty-seven".