1311220802 has 16 divisors (see below), whose sum is σ = 1990850400. Its totient is φ = 647618400.

The previous prime is 1311220793. The next prime is 1311220843. The reversal of 1311220802 is 2080221131.

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 7 ways as a sum of consecutive naturals, for example, 221177 + ... + 227027.

It is an arithmetic number, because the mean of its divisors is an integer number (124428150).

Almost surely, 2^1311220802 is an apocalyptic number.

1311220802 is a deficient number, since it is larger than the sum of its proper divisors (679629598).

1311220802 is a wasteful number, since it uses less digits than its factorization.

1311220802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7201.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1311220802 is about 36210.7829520434. The cubic root of 1311220802 is about 1094.5239695337.

Adding to 1311220802 its reverse (2080221131), we get a palindrome (3391441933).

The spelling of 1311220802 in words is "one billion, three hundred eleven million, two hundred twenty thousand, eight hundred two".