1203123321 has 16 divisors (see below), whose sum is σ = 1785833920. Its totient is φ = 800539200.

The previous prime is 1203123289. The next prime is 1203123331. The reversal of 1203123321 is 1233213021.

1203123321 is a `hidden beast` number, since 1 + 20 + 312 + 332 + 1 = 666.

It is not a de Polignac number, because 1203123321 - 2⁵ = 1203123289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203123294 and 1203123303.

It is not an unprimeable number, because it can be changed into a prime (1203123331) 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 in 15 ways as a sum of consecutive naturals, for example, 28480 + ... + 56721.

It is an arithmetic number, because the mean of its divisors is an integer number (111614620).

Almost surely, 2^1203123321 is an apocalyptic number.

It is an amenable number.

1203123321 is a deficient number, since it is larger than the sum of its proper divisors (582710599).

1203123321 is an equidigital number, since it uses as much as digits as its factorization.

1203123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85733 (or 85727 counting only the distinct ones).

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

The square root of 1203123321 is about 34686.0681109866. The cubic root of 1203123321 is about 1063.5797215249.

Adding to 1203123321 its reverse (1233213021), we get a palindrome (2436336342).

The spelling of 1203123321 in words is "one billion, two hundred three million, one hundred twenty-three thousand, three hundred twenty-one".