212200100020 has 24 divisors (see below), whose sum is σ = 445904653824. Its totient is φ = 84825860256.

The previous prime is 212200099999. The next prime is 212200100029. The reversal of 212200100020 is 20001002212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212200100029) 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, 3354112 + ... + 3416791.

It is an arithmetic number, because the mean of its divisors is an integer number (18579360576).

Almost surely, 2^212200100020 is an apocalyptic number.

212200100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212200100020 is an abundant number, since it is smaller than the sum of its proper divisors (233704553804).

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

212200100020 is a wasteful number, since it uses less digits than its factorization.

212200100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6772479 (or 6772477 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 212200100020 its reverse (20001002212), we get a palindrome (232201102232).

The spelling of 212200100020 in words is "two hundred twelve billion, two hundred million, one hundred thousand, twenty".