1231112113201 has 4 divisors (see below), whose sum is σ = 1295907487600. Its totient is φ = 1166316738804.

The previous prime is 1231112113181. The next prime is 1231112113207. The reversal of 1231112113201 is 1023112111321.

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 not a de Polignac number, because 1231112113201 - 2¹¹ = 1231112111153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 64795374379 = 1231112113201 / (1 + 2 + 3 + 1 + 1 + 1 + 2 + 1 + 1 + 3 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231112113207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32397687171 + ... + 32397687208.

It is an arithmetic number, because the mean of its divisors is an integer number (323976871900).

Almost surely, 2^{1231112113201} is an apocalyptic number.

It is an amenable number.

1231112113201 is a deficient number, since it is larger than the sum of its proper divisors (64795374399).

1231112113201 is an equidigital number, since it uses as much as digits as its factorization.

1231112113201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64795374398.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1231112113201 its reverse (1023112111321), we get a palindrome (2254224224522).

The spelling of 1231112113201 in words is "one trillion, two hundred thirty-one billion, one hundred twelve million, one hundred thirteen thousand, two hundred one".