1011311320323 has 24 divisors (see below), whose sum is σ = 1368108561664. Its totient is φ = 664500649680.

The previous prime is 1011311320309. The next prime is 1011311320391. The reversal of 1011311320323 is 3230231131101.

It is a happy number.

It is not a de Polignac number, because 1011311320323 - 2⁴ = 1011311320307 is a prime.

It is a super-2 number, since 2×1011311320323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011311320323.

It is not an unprimeable number, because it can be changed into a prime (1011311340323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58169490 + ... + 58186872.

Almost surely, 2^{1011311320323} is an apocalyptic number.

1011311320323 is a deficient number, since it is larger than the sum of its proper divisors (356797241341).

1011311320323 is an equidigital number, since it uses as much as digits as its factorization.

1011311320323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21375 (or 21304 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1011311320323 its reverse (3230231131101), we get a palindrome (4241542451424).

The spelling of 1011311320323 in words is "one trillion, eleven billion, three hundred eleven million, three hundred twenty thousand, three hundred twenty-three".