11001021021021 has 32 divisors (see below), whose sum is σ = 15519099801600. Its totient is φ = 6920423536320.

The previous prime is 11001021021019. The next prime is 11001021021031. The reversal of 11001021021021 is 12012012010011.

It is not a de Polignac number, because 11001021021021 - 2¹ = 11001021021019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11001021020988 and 11001021021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001021021031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 878760 + ... + 4772238.

It is an arithmetic number, because the mean of its divisors is an integer number (484971868800).

Almost surely, 2^{11001021021021} is an apocalyptic number.

It is an amenable number.

11001021021021 is a deficient number, since it is larger than the sum of its proper divisors (4518078780579).

11001021021021 is a wasteful number, since it uses less digits than its factorization.

11001021021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894249.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11001021021021 its reverse (12012012010011), we get a palindrome (23013033031032).

The spelling of 11001021021021 in words is "eleven trillion, one billion, twenty-one million, twenty-one thousand, twenty-one".