212221220202 has 96 divisors (see below), whose sum is σ = 502939172736. Its totient is φ = 64478937600.

The previous prime is 212221220191. The next prime is 212221220287. The reversal of 212221220202 is 202022122212.

212221220202 is a `hidden beast` number, since 21 + 2 + 221 + 220 + 202 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 584502 + ... + 875262.

It is an arithmetic number, because the mean of its divisors is an integer number (5238949716).

Almost surely, 2^212221220202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212221220202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251469586368).

212221220202 is an abundant number, since it is smaller than the sum of its proper divisors (290717952534).

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

212221220202 is a wasteful number, since it uses less digits than its factorization.

212221220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290876 (or 290873 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 212221220202 its reverse (202022122212), we get a palindrome (414243342414).

The spelling of 212221220202 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, two hundred two".