11120121221 has 8 divisors (see below), whose sum is σ = 12132244800. Its totient is φ = 10108198240.

The previous prime is 11120121217. The next prime is 11120121223. The reversal of 11120121221 is 12212102111.

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 11120121221 - 2² = 11120121217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11120121196 and 11120121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120121223) 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, 80600 + ... + 169518.

It is an arithmetic number, because the mean of its divisors is an integer number (1516530600).

Almost surely, 2^11120121221 is an apocalyptic number.

11120121221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11120121221 is a deficient number, since it is larger than the sum of its proper divisors (1012123579).

11120121221 is a wasteful number, since it uses less digits than its factorization.

11120121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100299.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11120121221 its reverse (12212102111), we get a palindrome (23332223332).

The spelling of 11120121221 in words is "eleven billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".