20115101113 has 2 divisors, whose sum is σ = 20115101114. Its totient is φ = 20115101112.

The previous prime is 20115101087. The next prime is 20115101119. The reversal of 20115101113 is 31110151102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15230768569 + 4884332544 = 123413^2 + 69888^2 .

It is a cyclic number.

It is not a de Polignac number, because 20115101113 - 2⁹ = 20115100601 is a prime.

It is not a weakly prime, because it can be changed into another prime (20115101119) 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, 10057550556 + 10057550557.

It is an arithmetic number, because the mean of its divisors is an integer number (10057550557).

Almost surely, 2^20115101113 is an apocalyptic number.

It is an amenable number.

20115101113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20115101113 is an equidigital number, since it uses as much as digits as its factorization.

20115101113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 16.

Adding to 20115101113 its reverse (31110151102), we get a palindrome (51225252215).

The spelling of 20115101113 in words is "twenty billion, one hundred fifteen million, one hundred one thousand, one hundred thirteen".