212204021256 has 48 divisors (see below), whose sum is σ = 575889827760. Its totient is φ = 70590599520.

The previous prime is 212204021231. The next prime is 212204021257. The reversal of 212204021256 is 652120402212.

212204021256 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 0 + 402 + 1 + 256 = 666.

It is not an unprimeable number, because it can be changed into a prime (212204021257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2965950 + ... + 3036653.

It is an arithmetic number, because the mean of its divisors is an integer number (11997704745).

Almost surely, 2^212204021256 is an apocalyptic number.

It is an amenable number.

212204021256 is an abundant number, since it is smaller than the sum of its proper divisors (363685806504).

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

212204021256 is a wasteful number, since it uses less digits than its factorization.

212204021256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6003106 (or 6003099 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 212204021256 its reverse (652120402212), we get a palindrome (864324423468).

It can be divided in two parts, 2122040 and 21256, that added together give a square (2143296 = 1464²).

The spelling of 212204021256 in words is "two hundred twelve billion, two hundred four million, twenty-one thousand, two hundred fifty-six".