211222331321 has 4 divisors (see below), whose sum is σ = 218035954944. Its totient is φ = 204408707700.

The previous prime is 211222331317. The next prime is 211222331347. The reversal of 211222331321 is 123133222112.

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 cyclic number.

It is not a de Polignac number, because 211222331321 - 2² = 211222331317 is a prime.

It is a super-2 number, since 2×211222331321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211222331351) 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, 3406811765 + ... + 3406811826.

It is an arithmetic number, because the mean of its divisors is an integer number (54508988736).

Almost surely, 2^211222331321 is an apocalyptic number.

It is an amenable number.

211222331321 is a deficient number, since it is larger than the sum of its proper divisors (6813623623).

211222331321 is an equidigital number, since it uses as much as digits as its factorization.

211222331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813623622.

The product of its digits is 864, while the sum is 23.

Adding to 211222331321 its reverse (123133222112), we get a palindrome (334355553433).

The spelling of 211222331321 in words is "two hundred eleven billion, two hundred twenty-two million, three hundred thirty-one thousand, three hundred twenty-one".