11121200021 has 8 divisors (see below), whose sum is σ = 11397712704. Its totient is φ = 10844938080.

The previous prime is 11121200009. The next prime is 11121200047. The reversal of 11121200021 is 12000212111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11121200021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121199975 and 11121200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121200081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28760 + ... + 151886.

It is an arithmetic number, because the mean of its divisors is an integer number (1424714088).

Almost surely, 2^11121200021 is an apocalyptic number.

It is an amenable number.

11121200021 is a deficient number, since it is larger than the sum of its proper divisors (276512683).

11121200021 is a wasteful number, since it uses less digits than its factorization.

11121200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125371.

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

Adding to 11121200021 its reverse (12000212111), we get a palindrome (23121412132).

The spelling of 11121200021 in words is "eleven billion, one hundred twenty-one million, two hundred thousand, twenty-one".