1233212321 has 16 divisors (see below), whose sum is σ = 1430317440. Its totient is φ = 1052113920.

The previous prime is 1233212311. The next prime is 1233212363. The reversal of 1233212321 is 1232123321.

It is not a de Polignac number, because 1233212321 - 2³⁰ = 159470497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1233212293 and 1233212302.

It is not an unprimeable number, because it can be changed into a prime (1233212311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32576 + ... + 59393.

It is an arithmetic number, because the mean of its divisors is an integer number (89394840).

Almost surely, 2^1233212321 is an apocalyptic number.

1233212321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1233212321 is a deficient number, since it is larger than the sum of its proper divisors (197105119).

1233212321 is a wasteful number, since it uses less digits than its factorization.

1233212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92056.

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

The square root of 1233212321 is about 35117.1229032220. The cubic root of 1233212321 is about 1072.3731996008.

Adding to 1233212321 its reverse (1232123321), we get a palindrome (2465335642).

The spelling of 1233212321 in words is "one billion, two hundred thirty-three million, two hundred twelve thousand, three hundred twenty-one".