212210022220 has 72 divisors (see below), whose sum is σ = 519893546256. Its totient is φ = 72547929216.

The previous prime is 212210022209. The next prime is 212210022247. The reversal of 212210022220 is 22220012212.

It is a super-2 number, since 2×212210022220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212210022194 and 212210022203.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28042 + ... + 652078.

It is an arithmetic number, because the mean of its divisors is an integer number (7220743698).

Almost surely, 2^212210022220 is an apocalyptic number.

212210022220 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 212210022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259946773128).

212210022220 is an abundant number, since it is smaller than the sum of its proper divisors (307683524036).

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

212210022220 is a wasteful number, since it uses less digits than its factorization.

212210022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624407 (or 624398 counting only the distinct ones).

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

Adding to 212210022220 its reverse (22220012212), we get a palindrome (234430034432).

The spelling of 212210022220 in words is "two hundred twelve billion, two hundred ten million, twenty-two thousand, two hundred twenty".