1200001022988 has 12 divisors (see below), whose sum is σ = 2800002387000. Its totient is φ = 400000340992.

The previous prime is 1200001022977. The next prime is 1200001023047. The reversal of 1200001022988 is 8892201000021.

It is a tau number, because it is divible by the number of its divisors (12).

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, 50000042613 + ... + 50000042636.

It is an arithmetic number, because the mean of its divisors is an integer number (233333532250).

Almost surely, 2^{1200001022988} is an apocalyptic number.

It is an amenable number.

1200001022988 is an abundant number, since it is smaller than the sum of its proper divisors (1600001364012).

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

1200001022988 is a wasteful number, since it uses less digits than its factorization.

1200001022988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100000085256 (or 100000085254 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The spelling of 1200001022988 in words is "one trillion, two hundred billion, one million, twenty-two thousand, nine hundred eighty-eight".