133123120123 has 4 divisors (see below), whose sum is σ = 152140708720. Its totient is φ = 114105531528.

The previous prime is 133123120111. The next prime is 133123120157. The reversal of 133123120123 is 321021321331.

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 133123120123 - 2³³ = 124533185531 is a prime.

It is a super-2 number, since 2×133123120123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133123120094 and 133123120103.

It is not an unprimeable number, because it can be changed into a prime (133123120223) 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, 9508794288 + ... + 9508794301.

It is an arithmetic number, because the mean of its divisors is an integer number (38035177180).

Almost surely, 2^133123120123 is an apocalyptic number.

133123120123 is a deficient number, since it is larger than the sum of its proper divisors (19017588597).

133123120123 is an equidigital number, since it uses as much as digits as its factorization.

133123120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19017588596.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 133123120123 its reverse (321021321331), we get a palindrome (454144441454).

The spelling of 133123120123 in words is "one hundred thirty-three billion, one hundred twenty-three million, one hundred twenty thousand, one hundred twenty-three".