11012002100021 has 16 divisors (see below), whose sum is σ = 12588951538800. Its totient is φ = 9542394375168.

The previous prime is 11012002099997. The next prime is 11012002100027. The reversal of 11012002100021 is 12000120021011.

It can be written as a sum of positive squares in 8 ways, for example, as 55736599396 + 10956265500625 = 236086^2 + 3310025^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012002100021 - 2¹⁸ = 11012001837877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11012002099975 and 11012002100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012002100027) 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 in 15 ways as a sum of consecutive naturals, for example, 63960386 + ... + 64132323.

It is an arithmetic number, because the mean of its divisors is an integer number (786809471175).

Almost surely, 2^{11012002100021} is an apocalyptic number.

It is an amenable number.

11012002100021 is a deficient number, since it is larger than the sum of its proper divisors (1576949438779).

11012002100021 is a wasteful number, since it uses less digits than its factorization.

11012002100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128093128.

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

Adding to 11012002100021 its reverse (12000120021011), we get a palindrome (23012122121032).

The spelling of 11012002100021 in words is "eleven trillion, twelve billion, two million, one hundred thousand, twenty-one".