123133321331 has 4 divisors (see below), whose sum is σ = 123134277600. Its totient is φ = 123132365064.

The previous prime is 123133321319. The next prime is 123133321343. The reversal of 123133321331 is 133123331321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (123133321319) and next prime (123133321343).

It is a cyclic number.

It is not a de Polignac number, because 123133321331 - 2¹⁴ = 123133304947 is a prime.

It is a super-2 number, since 2×123133321331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123133321331.

It is not an unprimeable number, because it can be changed into a prime (123133321351) 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, 248096 + ... + 554813.

It is an arithmetic number, because the mean of its divisors is an integer number (30783569400).

Almost surely, 2^123133321331 is an apocalyptic number.

123133321331 is a deficient number, since it is larger than the sum of its proper divisors (956269).

123133321331 is an equidigital number, since it uses as much as digits as its factorization.

123133321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956268.

The product of its digits is 2916, while the sum is 26.

Adding to 123133321331 its reverse (133123331321), we get a palindrome (256256652652).

The spelling of 123133321331 in words is "one hundred twenty-three billion, one hundred thirty-three million, three hundred twenty-one thousand, three hundred thirty-one".