123421133 has 4 divisors (see below), whose sum is σ = 134641248. Its totient is φ = 112201020.

The previous prime is 123421121. The next prime is 123421171. The reversal of 123421133 is 331124321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331124321 = 11 ⋅30102211.

It is a cyclic number.

It is not a de Polignac number, because 123421133 - 2¹² = 123417037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421033) 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, 5610041 + ... + 5610062.

It is an arithmetic number, because the mean of its divisors is an integer number (33660312).

Almost surely, 2^123421133 is an apocalyptic number.

It is an amenable number.

123421133 is a deficient number, since it is larger than the sum of its proper divisors (11220115).

123421133 is a wasteful number, since it uses less digits than its factorization.

123421133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11220114.

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

The square root of 123421133 is about 11109.5064246797. The cubic root of 123421133 is about 497.8859179119.

Adding to 123421133 its reverse (331124321), we get a palindrome (454545454).

The spelling of 123421133 in words is "one hundred twenty-three million, four hundred twenty-one thousand, one hundred thirty-three".