11100220211121 has 4 divisors (see below), whose sum is σ = 14800293614832. Its totient is φ = 7400146807412.

The previous prime is 11100220211083. The next prime is 11100220211159. The reversal of 11100220211121 is 12111202200111.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (11100220211083) and next prime (11100220211159).

It is a cyclic number.

It is not a de Polignac number, because 11100220211121 - 2¹⁷ = 11100220080049 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11100220211121.

It is not an unprimeable number, because it can be changed into a prime (11100220211221) 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, 1850036701851 + ... + 1850036701856.

It is an arithmetic number, because the mean of its divisors is an integer number (3700073403708).

Almost surely, 2^{11100220211121} is an apocalyptic number.

It is an amenable number.

11100220211121 is a deficient number, since it is larger than the sum of its proper divisors (3700073403711).

11100220211121 is an equidigital number, since it uses as much as digits as its factorization.

11100220211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700073403710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11100220211121 its reverse (12111202200111), we get a palindrome (23211422411232).

The spelling of 11100220211121 in words is "eleven trillion, one hundred billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".