1231333121123 has 16 divisors (see below), whose sum is σ = 1411436765184. Its totient is φ = 1052283852000.

The previous prime is 1231333121099. The next prime is 1231333121177. The reversal of 1231333121123 is 3211213331321.

It is a cyclic number.

It is not a de Polignac number, because 1231333121123 - 2⁶ = 1231333121059 is a prime.

It is a super-2 number, since 2×1231333121123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231333121092 and 1231333121101.

It is not an unprimeable number, because it can be changed into a prime (1231333121323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2998061 + ... + 3383937.

It is an arithmetic number, because the mean of its divisors is an integer number (88214797824).

Almost surely, 2^{1231333121123} is an apocalyptic number.

1231333121123 is a deficient number, since it is larger than the sum of its proper divisors (180103644061).

1231333121123 is an equidigital number, since it uses as much as digits as its factorization.

1231333121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387242.

The product of its digits is 1944, while the sum is 26.

Adding to 1231333121123 its reverse (3211213331321), we get a palindrome (4442546452444).

The spelling of 1231333121123 in words is "one trillion, two hundred thirty-one billion, three hundred thirty-three million, one hundred twenty-one thousand, one hundred twenty-three".