211223122321 has 2 divisors, whose sum is σ = 211223122322. Its totient is φ = 211223122320.

The previous prime is 211223122309. The next prime is 211223122351. The reversal of 211223122321 is 123221322112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116073083025 + 95150039296 = 340695^2 + 308464^2 .

It is a cyclic number.

It is not a de Polignac number, because 211223122321 - 2²⁵ = 211189567889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211223122292 and 211223122301.

It is not a weakly prime, because it can be changed into another prime (211223122351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611561160 + 105611561161.

It is an arithmetic number, because the mean of its divisors is an integer number (105611561161).

Almost surely, 2^211223122321 is an apocalyptic number.

It is an amenable number.

211223122321 is a deficient number, since it is larger than the sum of its proper divisors (1).

211223122321 is an equidigital number, since it uses as much as digits as its factorization.

211223122321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

Adding to 211223122321 its reverse (123221322112), we get a palindrome (334444444433).

The spelling of 211223122321 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred twenty-two thousand, three hundred twenty-one".