13511476921 has 2 divisors, whose sum is σ = 13511476922. Its totient is φ = 13511476920.

The previous prime is 13511476919. The next prime is 13511476933. The reversal of 13511476921 is 12967411531.

13511476921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9280624896 + 4230852025 = 96336^2 + 65045^2 .

It is a cyclic number.

It is not a de Polignac number, because 13511476921 - 2¹ = 13511476919 is a prime.

Together with 13511476919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13511416921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6755738460 + 6755738461.

It is an arithmetic number, because the mean of its divisors is an integer number (6755738461).

Almost surely, 2^13511476921 is an apocalyptic number.

It is an amenable number.

13511476921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13511476921 is an equidigital number, since it uses as much as digits as its factorization.

13511476921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The spelling of 13511476921 in words is "thirteen billion, five hundred eleven million, four hundred seventy-six thousand, nine hundred twenty-one".