1233132221 has 4 divisors (see below), whose sum is σ = 1233772092. Its totient is φ = 1232492352.

The previous prime is 1233132217. The next prime is 1233132227. The reversal of 1233132221 is 1222313321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222313321 = 2311 ⋅528911.

It can be written as a sum of positive squares in 2 ways, for example, as 561026596 + 672105625 = 23686^2 + 25925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233132221 - 2² = 1233132217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1233132193 and 1233132202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233132227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317036 + ... + 320901.

It is an arithmetic number, because the mean of its divisors is an integer number (308443023).

Almost surely, 2^1233132221 is an apocalyptic number.

It is an amenable number.

1233132221 is a deficient number, since it is larger than the sum of its proper divisors (639871).

1233132221 is an equidigital number, since it uses as much as digits as its factorization.

1233132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639870.

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

The square root of 1233132221 is about 35115.9824154188. The cubic root of 1233132221 is about 1072.3499813894.

Adding to 1233132221 its reverse (1222313321), we get a palindrome (2455445542).

The spelling of 1233132221 in words is "one billion, two hundred thirty-three million, one hundred thirty-two thousand, two hundred twenty-one".