212171013113256 has 96 divisors (see below), whose sum is σ = 578957622984000. Its totient is φ = 70192791820800.

The previous prime is 212171013113153. The next prime is 212171013113351. The reversal of 212171013113256 is 652311310171212.

212171013113256 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 7 + 10 + 1 + 311 + 325 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 212171013113256.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12718486 + ... + 24209541.

It is an arithmetic number, because the mean of its divisors is an integer number (6030808572750).

Almost surely, 2^{212171013113256} is an apocalyptic number.

It is an amenable number.

212171013113256 is an abundant number, since it is smaller than the sum of its proper divisors (366786609870744).

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

212171013113256 is a wasteful number, since it uses less digits than its factorization.

212171013113256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36928639 (or 36928632 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

Adding to 212171013113256 its reverse (652311310171212), we get a palindrome (864482323284468).

The spelling of 212171013113256 in words is "two hundred twelve trillion, one hundred seventy-one billion, thirteen million, one hundred thirteen thousand, two hundred fifty-six".