11121230221 has 16 divisors (see below), whose sum is σ = 11914560000. Its totient is φ = 10344077568.

The previous prime is 11121230201. The next prime is 11121230269. The reversal of 11121230221 is 12203212111.

It is a cyclic number.

It is not a de Polignac number, because 11121230221 - 2¹⁷ = 11121099149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121230195 and 11121230204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121230201) 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, 493036 + ... + 515098.

It is an arithmetic number, because the mean of its divisors is an integer number (744660000).

Almost surely, 2^11121230221 is an apocalyptic number.

It is an amenable number.

11121230221 is a deficient number, since it is larger than the sum of its proper divisors (793329779).

11121230221 is a wasteful number, since it uses less digits than its factorization.

11121230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22428.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11121230221 its reverse (12203212111), we get a palindrome (23324442332).

The spelling of 11121230221 in words is "eleven billion, one hundred twenty-one million, two hundred thirty thousand, two hundred twenty-one".