1221233133 has 8 divisors (see below), whose sum is σ = 1650616768. Its totient is φ = 803002464.

The previous prime is 1221233119. The next prime is 1221233161. The reversal of 1221233133 is 3313321221.

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

It is not a de Polignac number, because 1221233133 - 2¹⁴ = 1221216749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221233183) 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, 2787985 + ... + 2788422.

It is an arithmetic number, because the mean of its divisors is an integer number (206327096).

Almost surely, 2^1221233133 is an apocalyptic number.

It is an amenable number.

1221233133 is a deficient number, since it is larger than the sum of its proper divisors (429383635).

1221233133 is an equidigital number, since it uses as much as digits as its factorization.

1221233133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576483.

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

The square root of 1221233133 is about 34946.1461823761. The cubic root of 1221233133 is about 1068.8896196515.

Adding to 1221233133 its reverse (3313321221), we get a palindrome (4534554354).

The spelling of 1221233133 in words is "one billion, two hundred twenty-one million, two hundred thirty-three thousand, one hundred thirty-three".