11004015221 has 8 divisors (see below), whose sum is σ = 11677267800. Its totient is φ = 10333646848.

The previous prime is 11004015173. The next prime is 11004015257. The reversal of 11004015221 is 12251040011.

It can be written as a sum of positive squares in 4 ways, for example, as 5210674225 + 5793340996 = 72185^2 + 76114^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11004015221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 11004015221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11004015271) 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, 713186 + ... + 728451.

It is an arithmetic number, because the mean of its divisors is an integer number (1459658475).

Almost surely, 2^11004015221 is an apocalyptic number.

It is an amenable number.

11004015221 is a deficient number, since it is larger than the sum of its proper divisors (673252579).

11004015221 is a wasteful number, since it uses less digits than its factorization.

11004015221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442103.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 11004015221 its reverse (12251040011), we get a palindrome (23255055232).

The spelling of 11004015221 in words is "eleven billion, four million, fifteen thousand, two hundred twenty-one".