11042111521 has 16 divisors (see below), whose sum is σ = 12959331840. Its totient is φ = 9212063040.

The previous prime is 11042111491. The next prime is 11042111527. The reversal of 11042111521 is 12511124011.

It is a cyclic number.

It is not a de Polignac number, because 11042111521 - 2¹¹ = 11042109473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11042111527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33166 + ... + 152263.

It is an arithmetic number, because the mean of its divisors is an integer number (809958240).

Almost surely, 2^11042111521 is an apocalyptic number.

It is an amenable number.

11042111521 is a deficient number, since it is larger than the sum of its proper divisors (1917220319).

11042111521 is a wasteful number, since it uses less digits than its factorization.

11042111521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185664.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 11042111521 its reverse (12511124011), we get a palindrome (23553235532).

The spelling of 11042111521 in words is "eleven billion, forty-two million, one hundred eleven thousand, five hundred twenty-one".