11010001021 has 2 divisors, whose sum is σ = 11010001022. Its totient is φ = 11010001020.

The previous prime is 11010001019. The next prime is 11010001039. The reversal of 11010001021 is 12010001011.

11010001021 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., 9868236921 + 1141764100 = 99339^2 + 33790^2 .

It is a cyclic number.

It is not a de Polignac number, because 11010001021 - 2¹ = 11010001019 is a prime.

It is a super-4 number, since 4×11010001021⁴ (a number of 41 digits) contains 4444 as substring.

Together with 11010001019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11010000995 and 11010001013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11010071021) 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, 5505000510 + 5505000511.

It is an arithmetic number, because the mean of its divisors is an integer number (5505000511).

Almost surely, 2^11010001021 is an apocalyptic number.

It is an amenable number.

11010001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11010001021 is an equidigital number, since it uses as much as digits as its factorization.

11010001021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 11010001021 its reverse (12010001011), we get a palindrome (23020002032).

The spelling of 11010001021 in words is "eleven billion, ten million, one thousand, twenty-one".