11145314521 has 16 divisors (see below), whose sum is σ = 12222845568. Its totient is φ = 10078633600.

The previous prime is 11145314513. The next prime is 11145314567. The reversal of 11145314521 is 12541354111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11145314521 - 2³ = 11145314513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11145314521.

It is not an unprimeable number, because it can be changed into a prime (11145314501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1997091 + ... + 2002663.

It is an arithmetic number, because the mean of its divisors is an integer number (763927848).

Almost surely, 2^11145314521 is an apocalyptic number.

11145314521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11145314521 is a deficient number, since it is larger than the sum of its proper divisors (1077531047).

11145314521 is a wasteful number, since it uses less digits than its factorization.

11145314521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6512.

The product of its digits is 2400, while the sum is 28.

Adding to 11145314521 its reverse (12541354111), we get a palindrome (23686668632).

The spelling of 11145314521 in words is "eleven billion, one hundred forty-five million, three hundred fourteen thousand, five hundred twenty-one".