11012000021021 has 2 divisors, whose sum is σ = 11012000021022. Its totient is φ = 11012000021020.

The previous prime is 11012000020997. The next prime is 11012000021051. The reversal of 11012000021021 is 12012000021011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10980408868900 + 31591152121 = 3313670^2 + 177739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11012000021021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11012000020993 and 11012000021011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11012000021051) 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, 5506000010510 + 5506000010511.

It is an arithmetic number, because the mean of its divisors is an integer number (5506000010511).

Almost surely, 2^{11012000021021} is an apocalyptic number.

It is an amenable number.

11012000021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012000021021 is an equidigital number, since it uses as much as digits as its factorization.

11012000021021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11012000021021 its reverse (12012000021011), we get a palindrome (23024000042032).

The spelling of 11012000021021 in words is "eleven trillion, twelve billion, twenty-one thousand, twenty-one".