11213330221 has 2 divisors, whose sum is σ = 11213330222. Its totient is φ = 11213330220.

The previous prime is 11213330213. The next prime is 11213330267. The reversal of 11213330221 is 12203331211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10097436196 + 1115894025 = 100486^2 + 33405^2 .

It is a cyclic number.

It is not a de Polignac number, because 11213330221 - 2³ = 11213330213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11213330291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606665110 + 5606665111.

It is an arithmetic number, because the mean of its divisors is an integer number (5606665111).

Almost surely, 2^11213330221 is an apocalyptic number.

It is an amenable number.

11213330221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11213330221 is an equidigital number, since it uses as much as digits as its factorization.

11213330221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11213330221 its reverse (12203331211), we get a palindrome (23416661432).

The spelling of 11213330221 in words is "eleven billion, two hundred thirteen million, three hundred thirty thousand, two hundred twenty-one".