11154353411521 has 4 divisors (see below), whose sum is σ = 11426410811844. Its totient is φ = 10882296011200.

The previous prime is 11154353411503. The next prime is 11154353411527. The reversal of 11154353411521 is 12511435345111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3541306730896 + 7613046680625 = 1881836^2 + 2759175^2 .

It is a cyclic number.

It is not a de Polignac number, because 11154353411521 - 2⁷ = 11154353411393 is a prime.

It is a super-2 number, since 2×11154353411521² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11154353411527) 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 in 3 ways as a sum of consecutive naturals, for example, 136028700100 + ... + 136028700181.

It is an arithmetic number, because the mean of its divisors is an integer number (2856602702961).

Almost surely, 2^{11154353411521} is an apocalyptic number.

It is an amenable number.

11154353411521 is a deficient number, since it is larger than the sum of its proper divisors (272057400323).

11154353411521 is an equidigital number, since it uses as much as digits as its factorization.

11154353411521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272057400322.

The product of its digits is 36000, while the sum is 37.

Adding to 11154353411521 its reverse (12511435345111), we get a palindrome (23665788756632).

The spelling of 11154353411521 in words is "eleven trillion, one hundred fifty-four billion, three hundred fifty-three million, four hundred eleven thousand, five hundred twenty-one".