212012100220 has 24 divisors (see below), whose sum is σ = 445237690464. Its totient is φ = 84802501056.

The previous prime is 212012100211. The next prime is 212012100259. The reversal of 212012100220 is 22001210212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212012100220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723154 + ... + 973126.

It is an arithmetic number, because the mean of its divisors is an integer number (18551570436).

Almost surely, 2^212012100220 is an apocalyptic number.

212012100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012100220 is an abundant number, since it is smaller than the sum of its proper divisors (233225590244).

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

212012100220 is a wasteful number, since it uses less digits than its factorization.

212012100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292389 (or 292387 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212012100220 its reverse (22001210212), we get a palindrome (234013310432).

The spelling of 212012100220 in words is "two hundred twelve billion, twelve million, one hundred thousand, two hundred twenty".