13111020511 has 2 divisors, whose sum is σ = 13111020512. Its totient is φ = 13111020510.

The previous prime is 13111020499. The next prime is 13111020563. The reversal of 13111020511 is 11502011131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13111020511 - 2²³ = 13102631903 is a prime.

It is a super-2 number, since 2×13111020511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13111020581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6555510255 + 6555510256.

It is an arithmetic number, because the mean of its divisors is an integer number (6555510256).

Almost surely, 2^13111020511 is an apocalyptic number.

13111020511 is a deficient number, since it is larger than the sum of its proper divisors (1).

13111020511 is an equidigital number, since it uses as much as digits as its factorization.

13111020511 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 13111020511 its reverse (11502011131), we get a palindrome (24613031642).

The spelling of 13111020511 in words is "thirteen billion, one hundred eleven million, twenty thousand, five hundred eleven".