212210112220 has 96 divisors (see below), whose sum is σ = 461916919296. Its totient is φ = 81856992000.

The previous prime is 212210112197. The next prime is 212210112229. The reversal of 212210112220 is 22211012212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212210112194 and 212210112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210112229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11894947 + ... + 11912773.

It is an arithmetic number, because the mean of its divisors is an integer number (4811634576).

Almost surely, 2^212210112220 is an apocalyptic number.

212210112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212210112220 is an abundant number, since it is smaller than the sum of its proper divisors (249706807076).

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

212210112220 is a wasteful number, since it uses less digits than its factorization.

212210112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18091 (or 18089 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212210112220 its reverse (22211012212), we get a palindrome (234421124432).

The spelling of 212210112220 in words is "two hundred twelve billion, two hundred ten million, one hundred twelve thousand, two hundred twenty".