13134846821 has 2 divisors, whose sum is σ = 13134846822. Its totient is φ = 13134846820.

The previous prime is 13134846749. The next prime is 13134846859. The reversal of 13134846821 is 12864843131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13113456196 + 21390625 = 114514^2 + 4625^2 .

It is a cyclic number.

It is not a de Polignac number, because 13134846821 - 2³⁰ = 12061104997 is a prime.

It is a super-2 number, since 2×13134846821² (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 (13134846421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6567423410 + 6567423411.

It is an arithmetic number, because the mean of its divisors is an integer number (6567423411).

Almost surely, 2^13134846821 is an apocalyptic number.

It is an amenable number.

13134846821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13134846821 is an equidigital number, since it uses as much as digits as its factorization.

13134846821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The spelling of 13134846821 in words is "thirteen billion, one hundred thirty-four million, eight hundred forty-six thousand, eight hundred twenty-one".