133123221231 has 48 divisors (see below), whose sum is σ = 240123996672. Its totient is φ = 63835295040.

The previous prime is 133123221221. The next prime is 133123221233. The reversal of 133123221231 is 132122321331.

It is not a de Polignac number, because 133123221231 - 2⁵ = 133123221199 is a prime.

It is a super-2 number, since 2×133123221231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133123221233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1981971 + ... + 2048036.

It is an arithmetic number, because the mean of its divisors is an integer number (5002583264).

Almost surely, 2^133123221231 is an apocalyptic number.

133123221231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133123221231 is a deficient number, since it is larger than the sum of its proper divisors (107000775441).

133123221231 is a wasteful number, since it uses less digits than its factorization.

133123221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030052 (or 4030041 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 133123221231 its reverse (132122321331), we get a palindrome (265245542562).

The spelling of 133123221231 in words is "one hundred thirty-three billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred thirty-one".