11221320121 has 8 divisors (see below), whose sum is σ = 12242716704. Its totient is φ = 10200136320.

The previous prime is 11221320091. The next prime is 11221320163. The reversal of 11221320121 is 12102312211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11221320121 - 2¹³ = 11221311929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221320095 and 11221320104.

It is not an unprimeable number, because it can be changed into a prime (11221320191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69366 + ... + 165088.

It is an arithmetic number, because the mean of its divisors is an integer number (1530339588).

Almost surely, 2^11221320121 is an apocalyptic number.

11221320121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221320121 is a deficient number, since it is larger than the sum of its proper divisors (1021396583).

11221320121 is a wasteful number, since it uses less digits than its factorization.

11221320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106391.

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

Adding to 11221320121 its reverse (12102312211), we get a palindrome (23323632332).

The spelling of 11221320121 in words is "eleven billion, two hundred twenty-one million, three hundred twenty thousand, one hundred twenty-one".