1155533320012 has 12 divisors (see below), whose sum is σ = 2141135269560. Its totient is φ = 543780385856.

The previous prime is 1155533319989. The next prime is 1155533320079. The reversal of 1155533320012 is 2100233355511.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8496568462 + ... + 8496568597.

It is an arithmetic number, because the mean of its divisors is an integer number (178427939130).

Almost surely, 2^{1155533320012} is an apocalyptic number.

It is an amenable number.

1155533320012 is a deficient number, since it is larger than the sum of its proper divisors (985601949548).

1155533320012 is a wasteful number, since it uses less digits than its factorization.

1155533320012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16993137080 (or 16993137078 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 1155533320012 its reverse (2100233355511), we get a palindrome (3255766675523).

The spelling of 1155533320012 in words is "one trillion, one hundred fifty-five billion, five hundred thirty-three million, three hundred twenty thousand, twelve".