123133340431 has 12 divisors (see below), whose sum is σ = 130166069040. Its totient is φ = 116456304800.

The previous prime is 123133340419. The next prime is 123133340437. The reversal of 123133340431 is 134043331321.

It is not a de Polignac number, because 123133340431 - 2¹⁵ = 123133307663 is a prime.

It is a super-2 number, since 2×123133340431² (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 123133340431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123133340437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1260595 + ... + 1354756.

It is an arithmetic number, because the mean of its divisors is an integer number (10847172420).

Almost surely, 2^123133340431 is an apocalyptic number.

123133340431 is a deficient number, since it is larger than the sum of its proper divisors (7032728609).

123133340431 is an equidigital number, since it uses as much as digits as its factorization.

123133340431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615486 (or 2615463 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 123133340431 its reverse (134043331321), we get a palindrome (257176671752).

The spelling of 123133340431 in words is "one hundred twenty-three billion, one hundred thirty-three million, three hundred forty thousand, four hundred thirty-one".