212012201986 has 16 divisors (see below), whose sum is σ = 342504167544. Its totient is φ = 97845237504.

The previous prime is 212012201923. The next prime is 212012202041. The reversal of 212012201986 is 689102210212.

212012201986 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 208360296225 + 3651905761 = 456465^2 + 60431^2 .

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 7 ways as a sum of consecutive naturals, for example, 134656 + ... + 664948.

Almost surely, 2^212012201986 is an apocalyptic number.

212012201986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

212012201986 is a deficient number, since it is larger than the sum of its proper divisors (130491965558).

212012201986 is a wasteful number, since it uses less digits than its factorization.

212012201986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545685.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 212012201986 in words is "two hundred twelve billion, twelve million, two hundred one thousand, nine hundred eighty-six".