11200001221 has 4 divisors (see below), whose sum is σ = 11201082732. Its totient is φ = 11198919712.

The previous prime is 11200001213. The next prime is 11200001233. The reversal of 11200001221 is 12210000211.

11200001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10123176996 + 1076824225 = 100614^2 + 32815^2 .

It is a cyclic number.

It is not a de Polignac number, because 11200001221 - 2³ = 11200001213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11200001198 and 11200001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200071221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525070 + ... + 545983.

It is an arithmetic number, because the mean of its divisors is an integer number (2800270683).

Almost surely, 2^11200001221 is an apocalyptic number.

It is an amenable number.

11200001221 is a deficient number, since it is larger than the sum of its proper divisors (1081511).

11200001221 is a wasteful number, since it uses less digits than its factorization.

11200001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081510.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11200001221 its reverse (12210000211), we get a palindrome (23410001432).

The spelling of 11200001221 in words is "eleven billion, two hundred million, one thousand, two hundred twenty-one".