1213233321 has 4 divisors (see below), whose sum is σ = 1617644432. Its totient is φ = 808822212.

The previous prime is 1213233317. The next prime is 1213233361. The reversal of 1213233321 is 1233323121.

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.

It is not a de Polignac number, because 1213233321 - 2² = 1213233317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213233361) 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, 202205551 + ... + 202205556.

It is an arithmetic number, because the mean of its divisors is an integer number (404411108).

Almost surely, 2^1213233321 is an apocalyptic number.

It is an amenable number.

1213233321 is a deficient number, since it is larger than the sum of its proper divisors (404411111).

1213233321 is an equidigital number, since it uses as much as digits as its factorization.

1213233321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404411110.

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

The square root of 1213233321 is about 34831.4989772189. The cubic root of 1213233321 is about 1066.5505479825.

Adding to 1213233321 its reverse (1233323121), we get a palindrome (2446556442).

The spelling of 1213233321 in words is "one billion, two hundred thirteen million, two hundred thirty-three thousand, three hundred twenty-one".