211223002321 has 2 divisors, whose sum is σ = 211223002322. Its totient is φ = 211223002320.

The previous prime is 211223002307. The next prime is 211223002379. The reversal of 211223002321 is 123200322112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123929345296 + 87293657025 = 352036^2 + 295455^2 .

It is a cyclic number.

It is not a de Polignac number, because 211223002321 - 2²¹ = 211220905169 is a prime.

It is not a weakly prime, because it can be changed into another prime (211223062321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611501160 + 105611501161.

It is an arithmetic number, because the mean of its divisors is an integer number (105611501161).

Almost surely, 2^211223002321 is an apocalyptic number.

It is an amenable number.

211223002321 is a deficient number, since it is larger than the sum of its proper divisors (1).

211223002321 is an equidigital number, since it uses as much as digits as its factorization.

211223002321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 211223002321 its reverse (123200322112), we get a palindrome (334423324433).

The spelling of 211223002321 in words is "two hundred eleven billion, two hundred twenty-three million, two thousand, three hundred twenty-one".