1221232133 has 8 divisors (see below), whose sum is σ = 1333311840. Its totient is φ = 1109328880.

The previous prime is 1221232123. The next prime is 1221232151. The reversal of 1221232133 is 3312321221.

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

It is not a de Polignac number, because 1221232133 - 2⁶ = 1221232069 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 (1221232123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29423 + ... + 57516.

It is an arithmetic number, because the mean of its divisors is an integer number (166663980).

Almost surely, 2^1221232133 is an apocalyptic number.

It is an amenable number.

1221232133 is a deficient number, since it is larger than the sum of its proper divisors (112079707).

1221232133 is a wasteful number, since it uses less digits than its factorization.

1221232133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88227.

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

The square root of 1221232133 is about 34946.1318746439. The cubic root of 1221232133 is about 1068.8893279000.

Adding to 1221232133 its reverse (3312321221), we get a palindrome (4533553354).

The spelling of 1221232133 in words is "one billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred thirty-three".