1203213321 has 6 divisors (see below), whose sum is σ = 1737974810. Its totient is φ = 802142208.

The previous prime is 1203213313. The next prime is 1203213331. The reversal of 1203213321 is 1233123021.

1203213321 is a `hidden beast` number, since 1 + 20 + 321 + 3 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 739241721 + 463971600 = 27189^2 + 21540^2 .

It is not a de Polignac number, because 1203213321 - 2³ = 1203213313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203213294 and 1203213303.

It is not an unprimeable number, because it can be changed into a prime (1203213331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66845176 + ... + 66845193.

Almost surely, 2^1203213321 is an apocalyptic number.

It is an amenable number.

1203213321 is a deficient number, since it is larger than the sum of its proper divisors (534761489).

1203213321 is a wasteful number, since it uses less digits than its factorization.

1203213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133690375 (or 133690372 counting only the distinct ones).

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

The square root of 1203213321 is about 34687.3654375768. The cubic root of 1203213321 is about 1063.6062413301.

Adding to 1203213321 its reverse (1233123021), we get a palindrome (2436336342).

The spelling of 1203213321 in words is "one billion, two hundred three million, two hundred thirteen thousand, three hundred twenty-one".