1233500221 has 2 divisors, whose sum is σ = 1233500222. Its totient is φ = 1233500220.

The previous prime is 1233500201. The next prime is 1233500231. The reversal of 1233500221 is 1220053321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 744471225 + 489028996 = 27285^2 + 22114^2 .

It is an emirp because it is prime and its reverse (1220053321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1233500221 - 2²⁹ = 696629309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1233500201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616750110 + 616750111.

It is an arithmetic number, because the mean of its divisors is an integer number (616750111).

Almost surely, 2^1233500221 is an apocalyptic number.

It is an amenable number.

1233500221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233500221 is an equidigital number, since it uses as much as digits as its factorization.

1233500221 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 19.

The square root of 1233500221 is about 35121.2218039179. The cubic root of 1233500221 is about 1072.4566435238.

Adding to 1233500221 its reverse (1220053321), we get a palindrome (2453553542).

The spelling of 1233500221 in words is "one billion, two hundred thirty-three million, five hundred thousand, two hundred twenty-one".