1231123223313 has 32 divisors (see below), whose sum is σ = 1826687385600. Its totient is φ = 819488888208.

The previous prime is 1231123223311. The next prime is 1231123223327. The reversal of 1231123223313 is 3133223211321.

1231123223313 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 1 + 2 + 322 + 331 + 3 = 666.

It is not a de Polignac number, because 1231123223313 - 2¹ = 1231123223311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1231123223311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142767720 + ... + 142776342.

It is an arithmetic number, because the mean of its divisors is an integer number (57083980800).

Almost surely, 2^{1231123223313} is an apocalyptic number.

It is an amenable number.

1231123223313 is a deficient number, since it is larger than the sum of its proper divisors (595564162287).

1231123223313 is an equidigital number, since it uses as much as digits as its factorization.

1231123223313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16138 (or 16132 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1231123223313 its reverse (3133223211321), we get a palindrome (4364346434634).

It can be divided in two parts, 1231123 and 223313, that added together give a square (1454436 = 1206²).

The spelling of 1231123223313 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-three million, two hundred twenty-three thousand, three hundred thirteen".