1321211346 has 32 divisors (see below), whose sum is σ = 3252213888. Its totient is φ = 348451200.

The previous prime is 1321211329. The next prime is 1321211357. The reversal of 1321211346 is 6431121231.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1209355 + ... + 1210446.

It is an arithmetic number, because the mean of its divisors is an integer number (101631684).

Almost surely, 2^1321211346 is an apocalyptic number.

1321211346 is an abundant number, since it is smaller than the sum of its proper divisors (1931002542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321211346 is a wasteful number, since it uses less digits than its factorization.

1321211346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419826.

The product of its digits is 864, while the sum is 24.

The square root of 1321211346 is about 36348.4710269909. The cubic root of 1321211346 is about 1097.2967633726.

Adding to 1321211346 its reverse (6431121231), we get a palindrome (7752332577).

The spelling of 1321211346 in words is "one billion, three hundred twenty-one million, two hundred eleven thousand, three hundred forty-six".