212120020100 has 36 divisors (see below), whose sum is σ = 466605945204. Its totient is φ = 83685703680.

The previous prime is 212120020067. The next prime is 212120020141. The reversal of 212120020100 is 1020021212.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 30364456516 + 181755563584 = 174254^2 + 426328^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14521469 + ... + 14536068.

Almost surely, 2^212120020100 is an apocalyptic number.

212120020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212120020100 is an abundant number, since it is smaller than the sum of its proper divisors (254485925104).

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

212120020100 is a wasteful number, since it uses less digits than its factorization.

212120020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29057624 (or 29057617 counting only the distinct ones).

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

Adding to 212120020100 its reverse (1020021212), we get a palindrome (213140041312).

The spelling of 212120020100 in words is "two hundred twelve billion, one hundred twenty million, twenty thousand, one hundred".