1233221501 has 2 divisors, whose sum is σ = 1233221502. Its totient is φ = 1233221500.

The previous prime is 1233221489. The next prime is 1233221503. The reversal of 1233221501 is 1051223321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190319001 + 42902500 = 34501^2 + 6550^2 .

It is an emirp because it is prime and its reverse (1051223321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1233221501 - 2¹⁴ = 1233205117 is a prime.

It is a Sophie Germain prime.

Together with 1233221503, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1233221503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616610750 + 616610751.

It is an arithmetic number, because the mean of its divisors is an integer number (616610751).

Almost surely, 2^1233221501 is an apocalyptic number.

It is an amenable number.

1233221501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233221501 is an equidigital number, since it uses as much as digits as its factorization.

1233221501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1233221501 is about 35117.2536084472. The cubic root of 1233221501 is about 1072.3758605001.

Adding to 1233221501 its reverse (1051223321), we get a palindrome (2284444822).

It can be divided in two parts, 12332 and 21501, that added together give a palindrome (33833).

The spelling of 1233221501 in words is "one billion, two hundred thirty-three million, two hundred twenty-one thousand, five hundred one".