11112211201121 has 4 divisors (see below), whose sum is σ = 11112238737600. Its totient is φ = 11112183664644.

The previous prime is 11112211201061. The next prime is 11112211201127. The reversal of 11112211201121 is 12110211221111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11112211201121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11112211201121.

It is not an unprimeable number, because it can be changed into a prime (11112211201127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13153781 + ... + 13973058.

It is an arithmetic number, because the mean of its divisors is an integer number (2778059684400).

Almost surely, 2^{11112211201121} is an apocalyptic number.

It is an amenable number.

11112211201121 is a deficient number, since it is larger than the sum of its proper divisors (27536479).

11112211201121 is an equidigital number, since it uses as much as digits as its factorization.

11112211201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27536478.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11112211201121 its reverse (12110211221111), we get a palindrome (23222422422232).

The spelling of 11112211201121 in words is "eleven trillion, one hundred twelve billion, two hundred eleven million, two hundred one thousand, one hundred twenty-one".