211656512120 has 32 divisors (see below), whose sum is σ = 476244861120. Its totient is φ = 84659456640.

The previous prime is 211656512099. The next prime is 211656512147. The reversal of 211656512120 is 21215656112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1203410 + ... + 1368030.

It is an arithmetic number, because the mean of its divisors is an integer number (14882651910).

Almost surely, 2^211656512120 is an apocalyptic number.

211656512120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211656512120 is an abundant number, since it is smaller than the sum of its proper divisors (264588349000).

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

211656512120 is a wasteful number, since it uses less digits than its factorization.

211656512120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196775 (or 196771 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 211656512120 in words is "two hundred eleven billion, six hundred fifty-six million, five hundred twelve thousand, one hundred twenty".