212020102100 has 18 divisors (see below), whose sum is σ = 460083621774. Its totient is φ = 84808040800.

The previous prime is 212020102051. The next prime is 212020102103. The reversal of 212020102100 is 1201020212.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7873367824 + 204146734276 = 88732^2 + 451826^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020102103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1060100411 + ... + 1060100610.

Almost surely, 2^212020102100 is an apocalyptic number.

212020102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212020102100 is an abundant number, since it is smaller than the sum of its proper divisors (248063519674).

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

212020102100 is a wasteful number, since it uses less digits than its factorization.

212020102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120201035 (or 2120201028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 212020102100 its reverse (1201020212), we get a palindrome (213221122312).

The spelling of 212020102100 in words is "two hundred twelve billion, twenty million, one hundred two thousand, one hundred".