11021202121921 has 2 divisors, whose sum is σ = 11021202121922. Its totient is φ = 11021202121920.

The previous prime is 11021202121879. The next prime is 11021202121987. The reversal of 11021202121921 is 12912120212011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8297510691600 + 2723691430321 = 2880540^2 + 1650361^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021202121921 - 2⁷ = 11021202121793 is a prime.

It is not a weakly prime, because it can be changed into another prime (11021202121421) 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, 5510601060960 + 5510601060961.

It is an arithmetic number, because the mean of its divisors is an integer number (5510601060961).

Almost surely, 2^{11021202121921} is an apocalyptic number.

It is an amenable number.

11021202121921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021202121921 is an equidigital number, since it uses as much as digits as its factorization.

11021202121921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 11021202121921 its reverse (12912120212011), we get a palindrome (23933322333932).

The spelling of 11021202121921 in words is "eleven trillion, twenty-one billion, two hundred two million, one hundred twenty-one thousand, nine hundred twenty-one".