1212321203 has 8 divisors (see below), whose sum is σ = 1236903360. Its totient is φ = 1187873640.

The previous prime is 1212321193. The next prime is 1212321233. The reversal of 1212321203 is 3021232121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212321203 - 2¹⁸ = 1212059059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212321233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15353 + ... + 51578.

It is an arithmetic number, because the mean of its divisors is an integer number (154612920).

Almost surely, 2^1212321203 is an apocalyptic number.

1212321203 is a deficient number, since it is larger than the sum of its proper divisors (24582157).

1212321203 is an equidigital number, since it uses as much as digits as its factorization.

1212321203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67297.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1212321203 is about 34818.4032230084. The cubic root of 1212321203 is about 1066.2832007133.

Adding to 1212321203 its reverse (3021232121), we get a palindrome (4233553324).

The spelling of 1212321203 in words is "one billion, two hundred twelve million, three hundred twenty-one thousand, two hundred three".