20120210011985 has 8 divisors (see below), whose sum is σ = 24145075299240. Its totient is φ = 16095619153024.

The previous prime is 20120210011969. The next prime is 20120210012003. The reversal of 20120210011985 is 58911001202102.

It can be written as a sum of positive squares in 4 ways, for example, as 10001709852304 + 10118500159681 = 3162548^2 + 3180959^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20120210011985 - 2⁴ = 20120210011969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68445740 + ... + 68739069.

It is an arithmetic number, because the mean of its divisors is an integer number (3018134412405).

Almost surely, 2^{20120210011985} is an apocalyptic number.

It is an amenable number.

20120210011985 is a deficient number, since it is larger than the sum of its proper divisors (4024865287255).

20120210011985 is a wasteful number, since it uses less digits than its factorization.

20120210011985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137214147.

The product of its (nonzero) digits is 2880, while the sum is 32.

The spelling of 20120210011985 in words is "twenty trillion, one hundred twenty billion, two hundred ten million, eleven thousand, nine hundred eighty-five".