11012210211221 has 2 divisors, whose sum is σ = 11012210211222. Its totient is φ = 11012210211220.

The previous prime is 11012210211157. The next prime is 11012210211439. The reversal of 11012210211221 is 12211201221011.

11012210211221 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., 10792473336100 + 219736875121 = 3285190^2 + 468761^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012210211221 - 2⁶ = 11012210211157 is a prime.

It is a super-2 number, since 2×11012210211221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11012210211221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11012210211721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506105105610 + 5506105105611.

It is an arithmetic number, because the mean of its divisors is an integer number (5506105105611).

Almost surely, 2^{11012210211221} is an apocalyptic number.

It is an amenable number.

11012210211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012210211221 is an equidigital number, since it uses as much as digits as its factorization.

11012210211221 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 17.

Adding to 11012210211221 its reverse (12211201221011), we get a palindrome (23223411432232).

The spelling of 11012210211221 in words is "eleven trillion, twelve billion, two hundred ten million, two hundred eleven thousand, two hundred twenty-one".