11121120221 has 16 divisors (see below), whose sum is σ = 11459600064. Its totient is φ = 10787821824.

The previous prime is 11121120211. The next prime is 11121120281. The reversal of 11121120221 is 12202112111.

It is not a de Polignac number, because 11121120221 - 2¹⁴ = 11121103837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121120196 and 11121120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121120211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3361250 + ... + 3364556.

It is an arithmetic number, because the mean of its divisors is an integer number (716225004).

Almost surely, 2^11121120221 is an apocalyptic number.

It is an amenable number.

11121120221 is a deficient number, since it is larger than the sum of its proper divisors (338479843).

11121120221 is a wasteful number, since it uses less digits than its factorization.

11121120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060.

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

Adding to 11121120221 its reverse (12202112111), we get a palindrome (23323232332).

The spelling of 11121120221 in words is "eleven billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".