11121112011221 has 8 divisors (see below), whose sum is σ = 11309660174400. Its totient is φ = 10932565672800.

The previous prime is 11121112011167. The next prime is 11121112011223. The reversal of 11121112011221 is 12211021112111.

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-11121112011221 is a prime.

It is a super-2 number, since 2×11121112011221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11121112011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121112011223) 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, 18357800 + ... + 18953918.

It is an arithmetic number, because the mean of its divisors is an integer number (1413707521800).

Almost surely, 2^{11121112011221} is an apocalyptic number.

It is an amenable number.

11121112011221 is a deficient number, since it is larger than the sum of its proper divisors (188548163179).

11121112011221 is an equidigital number, since it uses as much as digits as its factorization.

11121112011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912379.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11121112011221 its reverse (12211021112111), we get a palindrome (23332133123332).

The spelling of 11121112011221 in words is "eleven trillion, one hundred twenty-one billion, one hundred twelve million, eleven thousand, two hundred twenty-one".