11121002121021 has 16 divisors (see below), whose sum is σ = 16037153286336. Its totient is φ = 6814321531776.

The previous prime is 11121002120971. The next prime is 11121002121043. The reversal of 11121002121021 is 12012120012111.

It is a happy number.

It is not a de Polignac number, because 11121002121021 - 2²¹ = 11121000023869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121002120021) 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, 611909155 + ... + 611927328.

It is an arithmetic number, because the mean of its divisors is an integer number (1002322080396).

Almost surely, 2^{11121002121021} is an apocalyptic number.

It is an amenable number.

11121002121021 is a deficient number, since it is larger than the sum of its proper divisors (4916151165315).

11121002121021 is a wasteful number, since it uses less digits than its factorization.

11121002121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223836732.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11121002121021 its reverse (12012120012111), we get a palindrome (23133122133132).

The spelling of 11121002121021 in words is "eleven trillion, one hundred twenty-one billion, two million, one hundred twenty-one thousand, twenty-one".