11001200121221 has 8 divisors (see below), whose sum is σ = 11012629051200. Its totient is φ = 10989772234560.

The previous prime is 11001200121161. The next prime is 11001200121239. The reversal of 11001200121221 is 12212100210011.

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-11001200121221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11001200121196 and 11001200121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001200421221) 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, 21806336 + ... + 22305126.

It is an arithmetic number, because the mean of its divisors is an integer number (1376578631400).

Almost surely, 2^{11001200121221} is an apocalyptic number.

It is an amenable number.

11001200121221 is a deficient number, since it is larger than the sum of its proper divisors (11428929979).

11001200121221 is a wasteful number, since it uses less digits than its factorization.

11001200121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521659.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11001200121221 its reverse (12212100210011), we get a palindrome (23213300331232).

The spelling of 11001200121221 in words is "eleven trillion, one billion, two hundred million, one hundred twenty-one thousand, two hundred twenty-one".