1221333 has 8 divisors (see below), whose sum is σ = 1672608. Its totient is φ = 792144.

The previous prime is 1221299. The next prime is 1221373. The reversal of 1221333 is 3331221.

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

It is not a de Polignac number, because 1221333 - 2¹⁰ = 1220309 is a prime.

It is a Curzon number.

1221333 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5391 + ... + 5612.

It is an arithmetic number, because the mean of its divisors is an integer number (209076).

2^1221333 is an apocalyptic number.

It is an amenable number.

1221333 is a deficient number, since it is larger than the sum of its proper divisors (451275).

1221333 is a wasteful number, since it uses less digits than its factorization.

1221333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11043.

The product of its digits is 108, while the sum is 15.

The square root of 1221333 is about 1105.1393577282. The cubic root of 1221333 is about 106.8918755200.

Adding to 1221333 its reverse (3331221), we get a palindrome (4552554).

It can be divided in two parts, 12213 and 33, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 1221333 in words is "one million, two hundred twenty-one thousand, three hundred thirty-three".