11011221311221 has 8 divisors (see below), whose sum is σ = 11025938808800. Its totient is φ = 10996508231280.

The previous prime is 11011221311219. The next prime is 11011221311239. The reversal of 11011221311221 is 12211312211011.

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

It is a cyclic number.

It is not a de Polignac number, because 11011221311221 - 2¹ = 11011221311219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011221311261) 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, 3899170 + ... + 6101308.

It is an arithmetic number, because the mean of its divisors is an integer number (1378242351100).

Almost surely, 2^{11011221311221} is an apocalyptic number.

It is an amenable number.

11011221311221 is a deficient number, since it is larger than the sum of its proper divisors (14717497579).

11011221311221 is an equidigital number, since it uses as much as digits as its factorization.

11011221311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208819.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 11011221311221 its reverse (12211312211011), we get a palindrome (23222533522232).

The spelling of 11011221311221 in words is "eleven trillion, eleven billion, two hundred twenty-one million, three hundred eleven thousand, two hundred twenty-one".