2120155665200 has 60 divisors (see below), whose sum is σ = 5102819358480. Its totient is φ = 846539623680.

The previous prime is 2120155665041. The next prime is 2120155665241. The reversal of 2120155665200 is 25665510212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4535180 + ... + 4980779.

It is an arithmetic number, because the mean of its divisors is an integer number (85046989308).

Almost surely, 2^{2120155665200} is an apocalyptic number.

2120155665200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120155665200 is an abundant number, since it is smaller than the sum of its proper divisors (2982663693280).

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

2120155665200 is a wasteful number, since it uses less digits than its factorization.

2120155665200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9516534 (or 9516523 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 2120155665200 in words is "two trillion, one hundred twenty billion, one hundred fifty-five million, six hundred sixty-five thousand, two hundred".