1012311321 has 16 divisors (see below), whose sum is σ = 1568716800. Its totient is φ = 568658448.

The previous prime is 1012311299. The next prime is 1012311341. The reversal of 1012311321 is 1231132101.

It is a happy number.

1012311321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1012311321 - 2¹¹ = 1012309273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012311321.

It is not an unprimeable number, because it can be changed into a prime (1012311341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407281 + ... + 409758.

It is an arithmetic number, because the mean of its divisors is an integer number (98044800).

Almost surely, 2^1012311321 is an apocalyptic number.

It is an amenable number.

1012311321 is a deficient number, since it is larger than the sum of its proper divisors (556405479).

1012311321 is an equidigital number, since it uses as much as digits as its factorization.

1012311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817108.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1012311321 is about 31816.8402108066. The cubic root of 1012311321 is about 1004.0870469572.

Adding to 1012311321 its reverse (1231132101), we get a palindrome (2243443422).

The spelling of 1012311321 in words is "one billion, twelve million, three hundred eleven thousand, three hundred twenty-one".