11001111073521 has 8 divisors (see below), whose sum is σ = 15025907807904. Its totient is φ = 7155194194080.

The previous prime is 11001111073483. The next prime is 11001111073531. The reversal of 11001111073521 is 12537011110011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11001111073521 - 2¹⁷ = 11001110942449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11001111073491 and 11001111073500.

It is not an unprimeable number, because it can be changed into a prime (11001111073531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44719963591 + ... + 44719963836.

It is an arithmetic number, because the mean of its divisors is an integer number (1878238475988).

Almost surely, 2^{11001111073521} is an apocalyptic number.

It is an amenable number.

11001111073521 is a deficient number, since it is larger than the sum of its proper divisors (4024796734383).

11001111073521 is an equidigital number, since it uses as much as digits as its factorization.

11001111073521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89439927471.

The product of its (nonzero) digits is 210, while the sum is 24.

Adding to 11001111073521 its reverse (12537011110011), we get a palindrome (23538122183532).

The spelling of 11001111073521 in words is "eleven trillion, one billion, one hundred eleven million, seventy-three thousand, five hundred twenty-one".