11001120121021 has 16 divisors (see below), whose sum is σ = 11669268219840. Its totient is φ = 10341896348160.

The previous prime is 11001120121009. The next prime is 11001120121067. The reversal of 11001120121021 is 12012102110011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11001120121021 - 2¹⁵ = 11001120088253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001120120992 and 11001120121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001120121001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41366551 + ... + 41631643.

It is an arithmetic number, because the mean of its divisors is an integer number (729329263740).

Almost surely, 2^{11001120121021} is an apocalyptic number.

It is an amenable number.

11001120121021 is a deficient number, since it is larger than the sum of its proper divisors (668148098819).

11001120121021 is a wasteful number, since it uses less digits than its factorization.

11001120121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281916.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11001120121021 its reverse (12012102110011), we get a palindrome (23013222231032).

The spelling of 11001120121021 in words is "eleven trillion, one billion, one hundred twenty million, one hundred twenty-one thousand, twenty-one".