969221321 has 2 divisors, whose sum is σ = 969221322. Its totient is φ = 969221320.

The previous prime is 969221251. The next prime is 969221329. The reversal of 969221321 is 123122969.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705646096 + 263575225 = 26564^2 + 16235^2 .

It is an emirp because it is prime and its reverse (123122969) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 969221321 - 2¹⁰ = 969220297 is a prime.

It is not a weakly prime, because it can be changed into another prime (969221329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484610660 + 484610661.

It is an arithmetic number, because the mean of its divisors is an integer number (484610661).

Almost surely, 2^969221321 is an apocalyptic number.

It is an amenable number.

969221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

969221321 is an equidigital number, since it uses as much as digits as its factorization.

969221321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 969221321 is about 31132.3195570134. The cubic root of 969221321 is about 989.6333441393.

It can be divided in two parts, 9692 and 21321, that added together give a palindrome (31013).

The spelling of 969221321 in words is "nine hundred sixty-nine million, two hundred twenty-one thousand, three hundred twenty-one".