212001222220 has 24 divisors (see below), whose sum is σ = 445556235600. Its totient is φ = 84733123392.

The previous prime is 212001222151. The next prime is 212001222221. The reversal of 212001222220 is 22222100212.

It is a junction number, because it is equal to n+sod(n) for n = 212001222194 and 212001222203.

It is not an unprimeable number, because it can be changed into a prime (212001222221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4184535 + ... + 4234894.

It is an arithmetic number, because the mean of its divisors is an integer number (18564843150).

Almost surely, 2^212001222220 is an apocalyptic number.

212001222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212001222220 is an abundant number, since it is smaller than the sum of its proper divisors (233555013380).

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

212001222220 is a wasteful number, since it uses less digits than its factorization.

212001222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8420697 (or 8420695 counting only the distinct ones).

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

Adding to 212001222220 its reverse (22222100212), we get a palindrome (234223322432).

The spelling of 212001222220 in words is "two hundred twelve billion, one million, two hundred twenty-two thousand, two hundred twenty".