1023111321 has 8 divisors (see below), whose sum is σ = 1408153344. Its totient is φ = 660071760.

The previous prime is 1023111301. The next prime is 1023111343. The reversal of 1023111321 is 1231113201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1023111321 - 2²⁵ = 989556889 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1023111321.

It is not an unprimeable number, because it can be changed into a prime (1023111301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5500506 + ... + 5500691.

It is an arithmetic number, because the mean of its divisors is an integer number (176019168).

Almost surely, 2^1023111321 is an apocalyptic number.

It is an amenable number.

1023111321 is a deficient number, since it is larger than the sum of its proper divisors (385042023).

1023111321 is a wasteful number, since it uses less digits than its factorization.

1023111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11001231.

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

The square root of 1023111321 is about 31986.1113766585. Note that the first 3 decimals coincide. The cubic root of 1023111321 is about 1007.6451760003.

Adding to 1023111321 its reverse (1231113201), we get a palindrome (2254224522).

The spelling of 1023111321 in words is "one billion, twenty-three million, one hundred eleven thousand, three hundred twenty-one".