2211320321 has 4 divisors (see below), whose sum is σ = 2527223232. Its totient is φ = 1895417412.

The previous prime is 2211320311. The next prime is 2211320359. The reversal of 2211320321 is 1230231122.

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.

It is a de Polignac number, because none of the positive numbers 2^k-2211320321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211320321.

It is not an unprimeable number, because it can be changed into a prime (2211320311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157951445 + ... + 157951458.

It is an arithmetic number, because the mean of its divisors is an integer number (631805808).

Almost surely, 2^2211320321 is an apocalyptic number.

It is an amenable number.

2211320321 is a deficient number, since it is larger than the sum of its proper divisors (315902911).

2211320321 is an equidigital number, since it uses as much as digits as its factorization.

2211320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315902910.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2211320321 is about 47024.6777873065. The cubic root of 2211320321 is about 1302.8184061736.

Adding to 2211320321 its reverse (1230231122), we get a palindrome (3441551443).

The spelling of 2211320321 in words is "two billion, two hundred eleven million, three hundred twenty thousand, three hundred twenty-one".