212212222020 has 432 divisors, whose sum is σ = 687638585088. Its totient is φ = 52939008000.

The previous prime is 212212222007. The next prime is 212212222043. The reversal of 212212222020 is 20222212212.

212212222020 is a `hidden beast` number, since 21 + 221 + 222 + 202 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 212212221984 and 212212222002.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 845466895 + ... + 845467145.

It is an arithmetic number, because the mean of its divisors is an integer number (1591755984).

Almost surely, 2^212212222020 is an apocalyptic number.

212212222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212212222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343819292544).

212212222020 is an abundant number, since it is smaller than the sum of its proper divisors (475426363068).

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

212212222020 is a wasteful number, since it uses less digits than its factorization.

212212222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 418 counting only the distinct ones).

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

Adding to 212212222020 its reverse (20222212212), we get a palindrome (232434434232).

The spelling of 212212222020 in words is "two hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, twenty".