1155121050072 has 32 divisors (see below), whose sum is σ = 3150330137280. Its totient is φ = 350036681760.

The previous prime is 1155121050059. The next prime is 1155121050133. The reversal of 1155121050072 is 2700501215511.

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, 2187728998 + ... + 2187729525.

It is an arithmetic number, because the mean of its divisors is an integer number (98447816790).

Almost surely, 2^{1155121050072} is an apocalyptic number.

1155121050072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155121050072 is an abundant number, since it is smaller than the sum of its proper divisors (1995209087208).

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

1155121050072 is a wasteful number, since it uses less digits than its factorization.

1155121050072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4375458543 (or 4375458539 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 30.

Adding to 1155121050072 its reverse (2700501215511), we get a palindrome (3855622265583).

The spelling of 1155121050072 in words is "one trillion, one hundred fifty-five billion, one hundred twenty-one million, fifty thousand, seventy-two".