11001210212221 has 2 divisors, whose sum is σ = 11001210212222. Its totient is φ = 11001210212220.

The previous prime is 11001210212191. The next prime is 11001210212227. The reversal of 11001210212221 is 12221201210011.

11001210212221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7914375562500 + 3086834649721 = 2813250^2 + 1756939^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001210212221 - 2⁹ = 11001210211709 is a prime.

It is a super-2 number, since 2×11001210212221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11001210212195 and 11001210212204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11001210212227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500605106110 + 5500605106111.

It is an arithmetic number, because the mean of its divisors is an integer number (5500605106111).

Almost surely, 2^{11001210212221} is an apocalyptic number.

It is an amenable number.

11001210212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001210212221 is an equidigital number, since it uses as much as digits as its factorization.

11001210212221 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 11001210212221 its reverse (12221201210011), we get a palindrome (23222411422232).

The spelling of 11001210212221 in words is "eleven trillion, one billion, two hundred ten million, two hundred twelve thousand, two hundred twenty-one".