11554133121 has 6 divisors (see below), whose sum is σ = 16689303410. Its totient is φ = 7702755408.

The previous prime is 11554133077. The next prime is 11554133131. The reversal of 11554133121 is 12133145511.

11554133121 is a `hidden beast` number, since 115 + 541 + 3 + 3 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6714983025 + 4839150096 = 81945^2 + 69564^2 .

It is not a de Polignac number, because 11554133121 - 2⁹ = 11554132609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11554133131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 641896276 + ... + 641896293.

Almost surely, 2^11554133121 is an apocalyptic number.

It is an amenable number.

11554133121 is a deficient number, since it is larger than the sum of its proper divisors (5135170289).

11554133121 is a wasteful number, since it uses less digits than its factorization.

11554133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283792575 (or 1283792572 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

Adding to 11554133121 its reverse (12133145511), we get a palindrome (23687278632).

The spelling of 11554133121 in words is "eleven billion, five hundred fifty-four million, one hundred thirty-three thousand, one hundred twenty-one".