212012210220 has 48 divisors (see below), whose sum is σ = 624878096640. Its totient is φ = 53560979136.

The previous prime is 212012210213. The next prime is 212012210227. The reversal of 212012210220 is 22012210212.

It is an interprime number because it is at equal distance from previous prime (212012210213) and next prime (212012210227).

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 212012210220.

It is not an unprimeable number, because it can be changed into a prime (212012210227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92986672 + ... + 92988951.

It is an arithmetic number, because the mean of its divisors is an integer number (13018293680).

Almost surely, 2^212012210220 is an apocalyptic number.

212012210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012210220 is an abundant number, since it is smaller than the sum of its proper divisors (412865886420).

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

212012210220 is a wasteful number, since it uses less digits than its factorization.

212012210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185975654 (or 185975652 counting only the distinct ones).

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

Adding to 212012210220 its reverse (22012210212), we get a palindrome (234024420432).

The spelling of 212012210220 in words is "two hundred twelve billion, twelve million, two hundred ten thousand, two hundred twenty".