11221113121 has 8 divisors (see below), whose sum is σ = 11591135744. Its totient is φ = 10851593760.

The previous prime is 11221113103. The next prime is 11221113133. The reversal of 11221113121 is 12131112211.

It is a happy number.

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 11221113121 - 2⁷ = 11221112993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221113095 and 11221113104.

It is not an unprimeable number, because it can be changed into a prime (11221113151) 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, 80220 + ... + 169933.

It is an arithmetic number, because the mean of its divisors is an integer number (1448891968).

Almost surely, 2^11221113121 is an apocalyptic number.

It is an amenable number.

11221113121 is a deficient number, since it is larger than the sum of its proper divisors (370022623).

11221113121 is a wasteful number, since it uses less digits than its factorization.

11221113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251631.

The product of its digits is 24, while the sum is 16.

Adding to 11221113121 its reverse (12131112211), we get a palindrome (23352225332).

The spelling of 11221113121 in words is "eleven billion, two hundred twenty-one million, one hundred thirteen thousand, one hundred twenty-one".