1131220312323 has 4 divisors (see below), whose sum is σ = 1508293749768. Its totient is φ = 754146874880.

The previous prime is 1131220312303. The next prime is 1131220312361. The reversal of 1131220312323 is 3232130221311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131220312323 - 2⁶ = 1131220312259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131220312293 and 1131220312302.

It is not an unprimeable number, because it can be changed into a prime (1131220312303) 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 in 3 ways as a sum of consecutive naturals, for example, 188536718718 + ... + 188536718723.

It is an arithmetic number, because the mean of its divisors is an integer number (377073437442).

Almost surely, 2^{1131220312323} is an apocalyptic number.

1131220312323 is a deficient number, since it is larger than the sum of its proper divisors (377073437445).

1131220312323 is an equidigital number, since it uses as much as digits as its factorization.

1131220312323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377073437444.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1131220312323 its reverse (3232130221311), we get a palindrome (4363350533634).

The spelling of 1131220312323 in words is "one trillion, one hundred thirty-one billion, two hundred twenty million, three hundred twelve thousand, three hundred twenty-three".