13531413121 has 2 divisors, whose sum is σ = 13531413122. Its totient is φ = 13531413120.

The previous prime is 13531413089. The next prime is 13531413139. The reversal of 13531413121 is 12131413531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6970413121 + 6561000000 = 83489^2 + 81000^2 .

It is a cyclic number.

It is not a de Polignac number, because 13531413121 - 2⁵ = 13531413089 is a prime.

It is not a weakly prime, because it can be changed into another prime (13531413151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765706560 + 6765706561.

It is an arithmetic number, because the mean of its divisors is an integer number (6765706561).

Almost surely, 2^13531413121 is an apocalyptic number.

It is an amenable number.

13531413121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531413121 is an equidigital number, since it uses as much as digits as its factorization.

13531413121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

Adding to 13531413121 its reverse (12131413531), we get a palindrome (25662826652).

The spelling of 13531413121 in words is "thirteen billion, five hundred thirty-one million, four hundred thirteen thousand, one hundred twenty-one".