11011001221061 has 2 divisors, whose sum is σ = 11011001221062. Its totient is φ = 11011001221060.

The previous prime is 11011001221057. The next prime is 11011001221127. The reversal of 11011001221061 is 16012210011011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6092475270436 + 4918525950625 = 2468294^2 + 2217775^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011001221061 - 2² = 11011001221057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011001221861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505500610530 + 5505500610531.

It is an arithmetic number, because the mean of its divisors is an integer number (5505500610531).

Almost surely, 2^{11011001221061} is an apocalyptic number.

It is an amenable number.

11011001221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011001221061 is an equidigital number, since it uses as much as digits as its factorization.

11011001221061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 11011001221061 its reverse (16012210011011), we get a palindrome (27023211232072).

The spelling of 11011001221061 in words is "eleven trillion, eleven billion, one million, two hundred twenty-one thousand, sixty-one".