1231304111311 has 8 divisors (see below), whose sum is σ = 1291211682480. Its totient is φ = 1172559794112.

The previous prime is 1231304111293. The next prime is 1231304111333. The reversal of 1231304111311 is 1131114031321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231304111311 - 2¹⁷ = 1231303980239 is a prime.

It is a super-2 number, since 2×1231304111311² (a number of 25 digits) contains 22 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 (1231304711311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290811325 + ... + 290815558.

It is an arithmetic number, because the mean of its divisors is an integer number (161401460310).

Almost surely, 2^{1231304111311} is an apocalyptic number.

1231304111311 is a deficient number, since it is larger than the sum of its proper divisors (59907571169).

1231304111311 is an equidigital number, since it uses as much as digits as its factorization.

1231304111311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581626985.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 1231304111311 its reverse (1131114031321), we get a palindrome (2362418142632).

The spelling of 1231304111311 in words is "one trillion, two hundred thirty-one billion, three hundred four million, one hundred eleven thousand, three hundred eleven".