212101202220 has 24 divisors (see below), whose sum is σ = 593883366384. Its totient is φ = 56560320576.

The previous prime is 212101202197. The next prime is 212101202221. The reversal of 212101202220 is 22202101212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212101202220.

It is not an unprimeable number, because it can be changed into a prime (212101202221) 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, 1767509959 + ... + 1767510078.

It is an arithmetic number, because the mean of its divisors is an integer number (24745140266).

Almost surely, 2^212101202220 is an apocalyptic number.

212101202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212101202220 is an abundant number, since it is smaller than the sum of its proper divisors (381782164164).

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

212101202220 is a wasteful number, since it uses less digits than its factorization.

212101202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535020049 (or 3535020047 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212101202220 its reverse (22202101212), we get a palindrome (234303303432).

The spelling of 212101202220 in words is "two hundred twelve billion, one hundred one million, two hundred two thousand, two hundred twenty".