1231133310123 has 4 divisors (see below), whose sum is σ = 1641511080168. Its totient is φ = 820755540080.

The previous prime is 1231133310119. The next prime is 1231133310131. The reversal of 1231133310123 is 3210133311321.

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 1231133310123 - 2² = 1231133310119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231133310093 and 1231133310102.

It is not an unprimeable number, because it can be changed into a prime (1231133310163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205188885018 + ... + 205188885023.

It is an arithmetic number, because the mean of its divisors is an integer number (410377770042).

Almost surely, 2^{1231133310123} is an apocalyptic number.

1231133310123 is a deficient number, since it is larger than the sum of its proper divisors (410377770045).

1231133310123 is an equidigital number, since it uses as much as digits as its factorization.

1231133310123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410377770044.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 1231133310123 its reverse (3210133311321), we get a palindrome (4441266621444).

The spelling of 1231133310123 in words is "one trillion, two hundred thirty-one billion, one hundred thirty-three million, three hundred ten thousand, one hundred twenty-three".