1221033323 has 4 divisors (see below), whose sum is σ = 1223671008. Its totient is φ = 1218395640.

The previous prime is 1221033293. The next prime is 1221033349. The reversal of 1221033323 is 3233301221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3233301221 = 47 ⋅68793643.

It is a cyclic number.

It is not a de Polignac number, because 1221033323 - 2¹⁰ = 1221032299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221033295 and 1221033304.

It is not an unprimeable number, because it can be changed into a prime (1221063323) 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, 1318148 + ... + 1319073.

It is an arithmetic number, because the mean of its divisors is an integer number (305917752).

Almost surely, 2^1221033323 is an apocalyptic number.

1221033323 is a deficient number, since it is larger than the sum of its proper divisors (2637685).

1221033323 is an equidigital number, since it uses as much as digits as its factorization.

1221033323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637684.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1221033323 is about 34943.2872380376. The cubic root of 1221033323 is about 1068.8313216143.

Adding to 1221033323 its reverse (3233301221), we get a palindrome (4454334544).

The spelling of 1221033323 in words is "one billion, two hundred twenty-one million, thirty-three thousand, three hundred twenty-three".