1231342323311 has 4 divisors (see below), whose sum is σ = 1232650870824. Its totient is φ = 1230033775800.

The previous prime is 1231342323301. The next prime is 1231342323331. The reversal of 1231342323311 is 1133232431321.

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 1231342323311 - 2¹⁴ = 1231342306927 is a prime.

It is a super-3 number, since 3×1231342323311³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231342323301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654272345 + ... + 654274226.

It is an arithmetic number, because the mean of its divisors is an integer number (308162717706).

Almost surely, 2^{1231342323311} is an apocalyptic number.

1231342323311 is a deficient number, since it is larger than the sum of its proper divisors (1308547513).

1231342323311 is an equidigital number, since it uses as much as digits as its factorization.

1231342323311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308547512.

The product of its digits is 7776, while the sum is 29.

Adding to 1231342323311 its reverse (1133232431321), we get a palindrome (2364574754632).

The spelling of 1231342323311 in words is "one trillion, two hundred thirty-one billion, three hundred forty-two million, three hundred twenty-three thousand, three hundred eleven".