1011217321 has 2 divisors, whose sum is σ = 1011217322. Its totient is φ = 1011217320.

The previous prime is 1011217309. The next prime is 1011217367. The reversal of 1011217321 is 1237121101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751362921 + 259854400 = 27411^2 + 16120^2 .

It is an emirp because it is prime and its reverse (1237121101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011217321 - 2⁹ = 1011216809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011217381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505608660 + 505608661.

It is an arithmetic number, because the mean of its divisors is an integer number (505608661).

Almost surely, 2^1011217321 is an apocalyptic number.

It is an amenable number.

1011217321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011217321 is an equidigital number, since it uses as much as digits as its factorization.

1011217321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 1011217321 is about 31799.6434099504. The cubic root of 1011217321 is about 1003.7252125595.

Adding to 1011217321 its reverse (1237121101), we get a palindrome (2248338422).

The spelling of 1011217321 in words is "one billion, eleven million, two hundred seventeen thousand, three hundred twenty-one".