211132321 has 2 divisors, whose sum is σ = 211132322. Its totient is φ = 211132320.

The previous prime is 211132303. The next prime is 211132331. The reversal of 211132321 is 123231112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130850721 + 80281600 = 11439^2 + 8960^2 .

It is a cyclic number.

It is not a de Polignac number, because 211132321 - 2¹¹ = 211130273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211132295 and 211132304.

It is not a weakly prime, because it can be changed into another prime (211132301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105566160 + 105566161.

It is an arithmetic number, because the mean of its divisors is an integer number (105566161).

Almost surely, 2^211132321 is an apocalyptic number.

It is an amenable number.

211132321 is a deficient number, since it is larger than the sum of its proper divisors (1).

211132321 is an equidigital number, since it uses as much as digits as its factorization.

211132321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 16.

The square root of 211132321 is about 14530.3930091378. The cubic root of 211132321 is about 595.4586027245.

Adding to 211132321 its reverse (123231112), we get a palindrome (334363433).

The spelling of 211132321 in words is "two hundred eleven million, one hundred thirty-two thousand, three hundred twenty-one".