123133133123123 has 4 divisors (see below), whose sum is σ = 123148503638328. Its totient is φ = 123117762607920.

The previous prime is 123133133123101. The next prime is 123133133123131. The reversal of 123133133123123 is 321321331331321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123133133123123 is a prime.

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 123133133123123.

It is not an unprimeable number, because it can be changed into a prime (123133133173123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7685245586 + ... + 7685261607.

It is an arithmetic number, because the mean of its divisors is an integer number (30787125909582).

Almost surely, 2^{123133133123123} is an apocalyptic number.

123133133123123 is a deficient number, since it is larger than the sum of its proper divisors (15370515205).

123133133123123 is an equidigital number, since it uses as much as digits as its factorization.

123133133123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15370515204.

The product of its digits is 17496, while the sum is 32.

Adding to 123133133123123 its reverse (321321331331321), we get a palindrome (444454464454444).

The spelling of 123133133123123 in words is "one hundred twenty-three trillion, one hundred thirty-three billion, one hundred thirty-three million, one hundred twenty-three thousand, one hundred twenty-three".