1233213321 has 4 divisors (see below), whose sum is σ = 1644284432. Its totient is φ = 822142212.

The previous prime is 1233213299. The next prime is 1233213329. The reversal of 1233213321 is 1233123321.

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: 1233123321 = 3 ⋅411041107.

It is not a de Polignac number, because 1233213321 - 2⁶ = 1233213257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1233213329) 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 3 ways as a sum of consecutive naturals, for example, 205535551 + ... + 205535556.

It is an arithmetic number, because the mean of its divisors is an integer number (411071108).

Almost surely, 2^1233213321 is an apocalyptic number.

It is an amenable number.

1233213321 is a deficient number, since it is larger than the sum of its proper divisors (411071111).

1233213321 is an equidigital number, since it uses as much as digits as its factorization.

1233213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411071110.

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

The square root of 1233213321 is about 35117.1371412876. The cubic root of 1233213321 is about 1072.3734894598.

Adding to 1233213321 its reverse (1233123321), we get a palindrome (2466336642).

Subtracting from 1233213321 its reverse (1233123321), we obtain a square (90000 = 300²).

The spelling of 1233213321 in words is "one billion, two hundred thirty-three million, two hundred thirteen thousand, three hundred twenty-one".