1233162221 has 2 divisors, whose sum is σ = 1233162222. Its totient is φ = 1233162220.

The previous prime is 1233162199. The next prime is 1233162223. The reversal of 1233162221 is 1222613321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1143386596 + 89775625 = 33814^2 + 9475^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233162221 - 2¹⁸ = 1232900077 is a prime.

Together with 1233162223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1233162223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616581110 + 616581111.

It is an arithmetic number, because the mean of its divisors is an integer number (616581111).

Almost surely, 2^1233162221 is an apocalyptic number.

It is an amenable number.

1233162221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233162221 is an equidigital number, since it uses as much as digits as its factorization.

1233162221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 1233162221 is about 35116.4095687472. The cubic root of 1233162221 is about 1072.3586774665.

Adding to 1233162221 its reverse (1222613321), we get a palindrome (2455775542).

The spelling of 1233162221 in words is "one billion, two hundred thirty-three million, one hundred sixty-two thousand, two hundred twenty-one".