11211020221013 has 2 divisors, whose sum is σ = 11211020221014. Its totient is φ = 11211020221012.

The previous prime is 11211020221003. The next prime is 11211020221021. The reversal of 11211020221013 is 31012202011211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6079784981284 + 5131235239729 = 2465722^2 + 2265223^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211020221013 - 2⁴ = 11211020220997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11211020220982 and 11211020221000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211020221003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605510110506 + 5605510110507.

It is an arithmetic number, because the mean of its divisors is an integer number (5605510110507).

Almost surely, 2^{11211020221013} is an apocalyptic number.

It is an amenable number.

11211020221013 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211020221013 is an equidigital number, since it uses as much as digits as its factorization.

11211020221013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 11211020221013 its reverse (31012202011211), we get a palindrome (42223222232224).

The spelling of 11211020221013 in words is "eleven trillion, two hundred eleven billion, twenty million, two hundred twenty-one thousand, thirteen".