133124321 has 12 divisors (see below), whose sum is σ = 147495936. Its totient is φ = 120055320.

The previous prime is 133124311. The next prime is 133124347. The reversal of 133124321 is 123421331.

It is not a de Polignac number, because 133124321 - 2¹⁴ = 133107937 is a prime.

It is a super-2 number, since 2×133124321² = 35444169683422082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133124293 and 133124302.

It is not an unprimeable number, because it can be changed into a prime (133124311) 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, 11036 + ... + 19698.

It is an arithmetic number, because the mean of its divisors is an integer number (12291328).

Almost surely, 2^133124321 is an apocalyptic number.

133124321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133124321 is a deficient number, since it is larger than the sum of its proper divisors (14371615).

133124321 is a wasteful number, since it uses less digits than its factorization.

133124321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8812 (or 8801 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 133124321 is about 11537.9513346174. The cubic root of 133124321 is about 510.6058684486.

Adding to 133124321 its reverse (123421331), we get a palindrome (256545652).

It can be divided in two parts, 1331 and 24321, that added together give a palindrome (25652).

The spelling of 133124321 in words is "one hundred thirty-three million, one hundred twenty-four thousand, three hundred twenty-one".