1321212208 has 30 divisors (see below), whose sum is σ = 2623860212. Its totient is φ = 644480640.

The previous prime is 1321212203. The next prime is 1321212293. The reversal of 1321212208 is 8022121231.

It is not an unprimeable number, because it can be changed into a prime (1321212203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2335 + ... + 51457.

Almost surely, 2^1321212208 is an apocalyptic number.

It is an amenable number.

1321212208 is a deficient number, since it is larger than the sum of its proper divisors (1302648004).

1321212208 is an equidigital number, since it uses as much as digits as its factorization.

1321212208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49213 (or 49166 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1321212208 is about 36348.4828844341. The cubic root of 1321212208 is about 1097.2970020096.

Adding to 1321212208 its reverse (8022121231), we get a palindrome (9343333439).

The spelling of 1321212208 in words is "one billion, three hundred twenty-one million, two hundred twelve thousand, two hundred eight".