212221002012 has 24 divisors (see below), whose sum is σ = 497748055056. Its totient is φ = 70373803008.

The previous prime is 212221002011. The next prime is 212221002079. The reversal of 212221002012 is 210200122212.

It is a junction number, because it is equal to n+sod(n) for n = 212221001982 and 212221002000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221002011) by changing a digit.

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, 45813963 + ... + 45818594.

It is an arithmetic number, because the mean of its divisors is an integer number (20739502294).

Almost surely, 2^212221002012 is an apocalyptic number.

It is an amenable number.

212221002012 is an abundant number, since it is smaller than the sum of its proper divisors (285527053044).

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

212221002012 is a wasteful number, since it uses less digits than its factorization.

212221002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91632757 (or 91632755 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212221002012 its reverse (210200122212), we get a palindrome (422421124224).

The spelling of 212221002012 in words is "two hundred twelve billion, two hundred twenty-one million, two thousand, twelve".