2211204221 has 4 divisors (see below), whose sum is σ = 2222316000. Its totient is φ = 2200092444.

The previous prime is 2211204217. The next prime is 2211204223. The reversal of 2211204221 is 1224021122.

2211204221 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1224021122 = 2 ⋅612010561.

It is a cyclic number.

It is not a de Polignac number, because 2211204221 - 2² = 2211204217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211204221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211204223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555591 + ... + 5555988.

It is an arithmetic number, because the mean of its divisors is an integer number (555579000).

Almost surely, 2^2211204221 is an apocalyptic number.

It is an amenable number.

2211204221 is a deficient number, since it is larger than the sum of its proper divisors (11111779).

2211204221 is a wasteful number, since it uses less digits than its factorization.

2211204221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111778.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2211204221 is about 47023.4433128838. The cubic root of 2211204221 is about 1302.7956053364.

Adding to 2211204221 its reverse (1224021122), we get a palindrome (3435225343).

The spelling of 2211204221 in words is "two billion, two hundred eleven million, two hundred four thousand, two hundred twenty-one".