1203312321 has 64 divisors (see below), whose sum is σ = 1923747840. Its totient is φ = 741502080.

The previous prime is 1203312317. The next prime is 1203312349. The reversal of 1203312321 is 1232133021.

1203312321 is a `hidden beast` number, since 12 + 0 + 331 + 2 + 321 = 666.

It is not a de Polignac number, because 1203312321 - 2² = 1203312317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203312294 and 1203312303.

It is not an unprimeable number, because it can be changed into a prime (1203312391) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4251846 + ... + 4252128.

It is an arithmetic number, because the mean of its divisors is an integer number (30058560).

Almost surely, 2^1203312321 is an apocalyptic number.

It is an amenable number.

1203312321 is a deficient number, since it is larger than the sum of its proper divisors (720435519).

1203312321 is a wasteful number, since it uses less digits than its factorization.

1203312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1203312321 is about 34688.7924407870. The cubic root of 1203312321 is about 1063.6354115884.

Adding to 1203312321 its reverse (1232133021), we get a palindrome (2435445342).

The spelling of 1203312321 in words is "one billion, two hundred three million, three hundred twelve thousand, three hundred twenty-one".