1231301312111 has 8 divisors (see below), whose sum is σ = 1383669702240. Its totient is φ = 1087169051232.

The previous prime is 1231301312093. The next prime is 1231301312183. The reversal of 1231301312111 is 1112131031321.

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 1231301312111 - 2¹⁸ = 1231301049967 is a prime.

It is a super-2 number, since 2×1231301312111² (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 (1231301312011) 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, 2059031996 + ... + 2059032593.

It is an arithmetic number, because the mean of its divisors is an integer number (172958712780).

Almost surely, 2^{1231301312111} is an apocalyptic number.

1231301312111 is a deficient number, since it is larger than the sum of its proper divisors (152368390129).

1231301312111 is a wasteful number, since it uses less digits than its factorization.

1231301312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118064625.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1231301312111 its reverse (1112131031321), we get a palindrome (2343432343432).

The spelling of 1231301312111 in words is "one trillion, two hundred thirty-one billion, three hundred one million, three hundred twelve thousand, one hundred eleven".