22010321 has 2 divisors, whose sum is σ = 22010322. Its totient is φ = 22010320.

The previous prime is 22010309. The next prime is 22010327. The reversal of 22010321 is 12301022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21520321 + 490000 = 4639^2 + 700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22010321 is a prime.

It is not a weakly prime, because it can be changed into another prime (22010327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005160 + 11005161.

It is an arithmetic number, because the mean of its divisors is an integer number (11005161).

Almost surely, 2^22010321 is an apocalyptic number.

It is an amenable number.

22010321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22010321 is an equidigital number, since it uses as much as digits as its factorization.

22010321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22010321 is about 4691.5158531119. The cubic root of 22010321 is about 280.2477441665.

Adding to 22010321 its reverse (12301022), we get a palindrome (34311343).

The spelling of 22010321 in words is "twenty-two million, ten thousand, three hundred twenty-one".