1131011311321 has 4 divisors (see below), whose sum is σ = 1133433177552. Its totient is φ = 1128589445092.

The previous prime is 1131011311303. The next prime is 1131011311333. The reversal of 1131011311321 is 1231131101311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131011311321 - 2³⁵ = 1096651572953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131011311301) 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 3 ways as a sum of consecutive naturals, for example, 1210932415 + ... + 1210933348.

It is an arithmetic number, because the mean of its divisors is an integer number (283358294388).

Almost surely, 2^{1131011311321} is an apocalyptic number.

It is an amenable number.

1131011311321 is a deficient number, since it is larger than the sum of its proper divisors (2421866231).

1131011311321 is an equidigital number, since it uses as much as digits as its factorization.

1131011311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421866230.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 1131011311321 its reverse (1231131101311), we get a palindrome (2362142412632).

The spelling of 1131011311321 in words is "one trillion, one hundred thirty-one billion, eleven million, three hundred eleven thousand, three hundred twenty-one".