211556606120 has 16 divisors (see below), whose sum is σ = 476002363860. Its totient is φ = 84622642432.

The previous prime is 211556606113. The next prime is 211556606141. The reversal of 211556606120 is 21606655112.

It can be written as a sum of positive squares in 2 ways, for example, as 211285476964 + 271129156 = 459658^2 + 16466^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2644457537 + ... + 2644457616.

Almost surely, 2^211556606120 is an apocalyptic number.

211556606120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211556606120 is an abundant number, since it is smaller than the sum of its proper divisors (264445757740).

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

211556606120 is a wasteful number, since it uses less digits than its factorization.

211556606120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288915164 (or 5288915160 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 211556606120 in words is "two hundred eleven billion, five hundred fifty-six million, six hundred six thousand, one hundred twenty".