1233213123 has 8 divisors (see below), whose sum is σ = 1645883136. Its totient is φ = 821342600.

The previous prime is 1233213101. The next prime is 1233213151. The reversal of 1233213123 is 3213123321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1233213123 - 2¹² = 1233209027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1233213123.

It is not an unprimeable number, because it can be changed into a prime (1233213173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196263 + ... + 202448.

It is an arithmetic number, because the mean of its divisors is an integer number (205735392).

Almost surely, 2^1233213123 is an apocalyptic number.

1233213123 is a deficient number, since it is larger than the sum of its proper divisors (412670013).

1233213123 is a wasteful number, since it uses less digits than its factorization.

1233213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399745.

The product of its digits is 648, while the sum is 21.

The square root of 1233213123 is about 35117.1343221511. The cubic root of 1233213123 is about 1072.3734320677.

Adding to 1233213123 its reverse (3213123321), we get a palindrome (4446336444).

The spelling of 1233213123 in words is "one billion, two hundred thirty-three million, two hundred thirteen thousand, one hundred twenty-three".