11111120000221 has 4 divisors (see below), whose sum is σ = 11139683291100. Its totient is φ = 11082556709344.

The previous prime is 11111120000207. The next prime is 11111120000249. The reversal of 11111120000221 is 12200002111111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3516052512996 + 7595067487225 = 1875114^2 + 2755915^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111120000221 - 2²⁹ = 11110583129309 is a prime.

It is a super-2 number, since 2×11111120000221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111120000021) 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, 14281644856 + ... + 14281645633.

It is an arithmetic number, because the mean of its divisors is an integer number (2784920822775).

Almost surely, 2^{11111120000221} is an apocalyptic number.

It is an amenable number.

11111120000221 is a deficient number, since it is larger than the sum of its proper divisors (28563290879).

11111120000221 is an equidigital number, since it uses as much as digits as its factorization.

11111120000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28563290878.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11111120000221 its reverse (12200002111111), we get a palindrome (23311122111332).

The spelling of 11111120000221 in words is "eleven trillion, one hundred eleven billion, one hundred twenty million, two hundred twenty-one", and thus it is an aban number.