13554121121 has 2 divisors, whose sum is σ = 13554121122. Its totient is φ = 13554121120.

The previous prime is 13554121093. The next prime is 13554121159. The reversal of 13554121121 is 12112145531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13378160896 + 175960225 = 115664^2 + 13265^2 .

It is a cyclic number.

It is not a de Polignac number, because 13554121121 - 2²⁶ = 13487012257 is a prime.

It is not a weakly prime, because it can be changed into another prime (13554121171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6777060560 + 6777060561.

It is an arithmetic number, because the mean of its divisors is an integer number (6777060561).

Almost surely, 2^13554121121 is an apocalyptic number.

It is an amenable number.

13554121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13554121121 is an equidigital number, since it uses as much as digits as its factorization.

13554121121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 26.

Adding to 13554121121 its reverse (12112145531), we get a palindrome (25666266652).

The spelling of 13554121121 in words is "thirteen billion, five hundred fifty-four million, one hundred twenty-one thousand, one hundred twenty-one".