212201022220 has 48 divisors (see below), whose sum is σ = 490946502816. Its totient is φ = 76400000000.

The previous prime is 212201022203. The next prime is 212201022301. The reversal of 212201022220 is 22220102212.

It is a junction number, because it is equal to n+sod(n) for n = 212201022194 and 212201022203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4752781 + ... + 4797220.

It is an arithmetic number, because the mean of its divisors is an integer number (10228052142).

Almost surely, 2^212201022220 is an apocalyptic number.

212201022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212201022220 is an abundant number, since it is smaller than the sum of its proper divisors (278745480596).

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

212201022220 is a wasteful number, since it uses less digits than its factorization.

212201022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9550122 (or 9550120 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 212201022220 its reverse (22220102212), we get a palindrome (234421124432).

The spelling of 212201022220 in words is "two hundred twelve billion, two hundred one million, twenty-two thousand, two hundred twenty".