11101222121 has 8 divisors (see below), whose sum is σ = 12263721600. Its totient is φ = 9964272240.

The previous prime is 11101222117. The next prime is 11101222211. The reversal of 11101222121 is 12122210111.

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 11101222121 - 2² = 11101222117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101222096 and 11101222105.

It is not an unprimeable number, because it can be changed into a prime (11101222421) 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, 6386486 + ... + 6388223.

It is an arithmetic number, because the mean of its divisors is an integer number (1532965200).

Almost surely, 2^11101222121 is an apocalyptic number.

11101222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11101222121 is a deficient number, since it is larger than the sum of its proper divisors (1162499479).

11101222121 is a wasteful number, since it uses less digits than its factorization.

11101222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12774799.

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

Adding to 11101222121 its reverse (12122210111), we get a palindrome (23223432232).

The spelling of 11101222121 in words is "eleven billion, one hundred one million, two hundred twenty-two thousand, one hundred twenty-one".