11000211221221 has 2 divisors, whose sum is σ = 11000211221222. Its totient is φ = 11000211221220.

The previous prime is 11000211221203. The next prime is 11000211221243. The reversal of 11000211221221 is 12212211200011.

11000211221221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9557063102500 + 1443148118721 = 3091450^2 + 1201311^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000211221221 - 2⁵ = 11000211221189 is a prime.

It is a super-2 number, since 2×11000211221221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11000211221195 and 11000211221204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11000211221281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500105610610 + 5500105610611.

It is an arithmetic number, because the mean of its divisors is an integer number (5500105610611).

Almost surely, 2^{11000211221221} is an apocalyptic number.

It is an amenable number.

11000211221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000211221221 is an equidigital number, since it uses as much as digits as its factorization.

11000211221221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11000211221221 its reverse (12212211200011), we get a palindrome (23212422421232).

The spelling of 11000211221221 in words is "eleven trillion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".