11021221061 has 2 divisors, whose sum is σ = 11021221062. Its totient is φ = 11021221060.

The previous prime is 11021221049. The next prime is 11021221093. The reversal of 11021221061 is 16012212011.

11021221061 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., 10912936225 + 108284836 = 104465^2 + 10406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021221061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11021221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510610530 + 5510610531.

It is an arithmetic number, because the mean of its divisors is an integer number (5510610531).

Almost surely, 2^11021221061 is an apocalyptic number.

It is an amenable number.

11021221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021221061 is an equidigital number, since it uses as much as digits as its factorization.

11021221061 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 11021221061 its reverse (16012212011), we get a palindrome (27033433072).

The spelling of 11021221061 in words is "eleven billion, twenty-one million, two hundred twenty-one thousand, sixty-one".