1155122215512 has 32 divisors (see below), whose sum is σ = 2980960558080. Its totient is φ = 372620069280.

The previous prime is 1155122215477. The next prime is 1155122215531. The reversal of 1155122215512 is 2155122215511.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 776291068 + ... + 776292555.

It is an arithmetic number, because the mean of its divisors is an integer number (93155017440).

Almost surely, 2^{1155122215512} is an apocalyptic number.

1155122215512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155122215512 is an abundant number, since it is smaller than the sum of its proper divisors (1825838342568).

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

1155122215512 is a wasteful number, since it uses less digits than its factorization.

1155122215512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552583663 (or 1552583659 counting only the distinct ones).

The product of its digits is 10000, while the sum is 33.

Subtracting 1155122215512 from its reverse (2155122215511), we obtain a palindrome (999999999999).

The spelling of 1155122215512 in words is "one trillion, one hundred fifty-five billion, one hundred twenty-two million, two hundred fifteen thousand, five hundred twelve".