20111310113 has 2 divisors, whose sum is σ = 20111310114. Its totient is φ = 20111310112.

The previous prime is 20111310073. The next prime is 20111310139. The reversal of 20111310113 is 31101311102.

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., 16543876129 + 3567433984 = 128623^2 + 59728^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111310113 - 2⁶ = 20111310049 is a prime.

It is a super-2 number, since 2×20111310113² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20111310613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055655056 + 10055655057.

It is an arithmetic number, because the mean of its divisors is an integer number (10055655057).

Almost surely, 2^20111310113 is an apocalyptic number.

It is an amenable number.

20111310113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111310113 is an equidigital number, since it uses as much as digits as its factorization.

20111310113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 20111310113 its reverse (31101311102), we get a palindrome (51212621215).

The spelling of 20111310113 in words is "twenty billion, one hundred eleven million, three hundred ten thousand, one hundred thirteen".