1131223312321 has 16 divisors (see below), whose sum is σ = 1175249875968. Its totient is φ = 1087676193600.

The previous prime is 1131223312301. The next prime is 1131223312333. The reversal of 1131223312321 is 1232133221311.

It is a cyclic number.

It is not a de Polignac number, because 1131223312321 - 2²⁵ = 1131189757889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131223312301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8033695 + ... + 8173291.

It is an arithmetic number, because the mean of its divisors is an integer number (73453117248).

Almost surely, 2^{1131223312321} is an apocalyptic number.

It is an amenable number.

1131223312321 is a deficient number, since it is larger than the sum of its proper divisors (44026563647).

1131223312321 is a wasteful number, since it uses less digits than its factorization.

1131223312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141312.

The product of its digits is 1296, while the sum is 25.

Adding to 1131223312321 its reverse (1232133221311), we get a palindrome (2363356533632).

The spelling of 1131223312321 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-three million, three hundred twelve thousand, three hundred twenty-one".