11112001112221 has 2 divisors, whose sum is σ = 11112001112222. Its totient is φ = 11112001112220.

The previous prime is 11112001112183. The next prime is 11112001112227. The reversal of 11112001112221 is 12221110021111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10585984539321 + 526016572900 = 3253611^2 + 725270^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112001112221 - 2⁹ = 11112001111709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11112001112195 and 11112001112204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112001112227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556000556110 + 5556000556111.

It is an arithmetic number, because the mean of its divisors is an integer number (5556000556111).

Almost surely, 2^{11112001112221} is an apocalyptic number.

It is an amenable number.

11112001112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112001112221 is an equidigital number, since it uses as much as digits as its factorization.

11112001112221 is an evil number, because the sum of its binary digits is even.

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

Adding to 11112001112221 its reverse (12221110021111), we get a palindrome (23333111133332).

The spelling of 11112001112221 in words is "eleven trillion, one hundred twelve billion, one million, one hundred twelve thousand, two hundred twenty-one".