1321131123311 has 4 divisors (see below), whose sum is σ = 1321135961112. Its totient is φ = 1321126285512.

The previous prime is 1321131123307. The next prime is 1321131123337. The reversal of 1321131123311 is 1133211311231.

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 1321131123311 - 2² = 1321131123307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321131123391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1983101 + ... + 2564166.

It is an arithmetic number, because the mean of its divisors is an integer number (330283990278).

Almost surely, 2^{1321131123311} is an apocalyptic number.

1321131123311 is a deficient number, since it is larger than the sum of its proper divisors (4837801).

1321131123311 is an equidigital number, since it uses as much as digits as its factorization.

1321131123311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4837800.

The product of its digits is 324, while the sum is 23.

Adding to 1321131123311 its reverse (1133211311231), we get a palindrome (2454342434542).

The spelling of 1321131123311 in words is "one trillion, three hundred twenty-one billion, one hundred thirty-one million, one hundred twenty-three thousand, three hundred eleven".