212012022100 has 36 divisors (see below), whose sum is σ = 460422732448. Its totient is φ = 84739068000.

The previous prime is 212012022041. The next prime is 212012022109. The reversal of 212012022100 is 1220210212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012022109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 692016 + ... + 950215.

Almost surely, 2^212012022100 is an apocalyptic number.

212012022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012022100 is an abundant number, since it is smaller than the sum of its proper divisors (248410710348).

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

212012022100 is a wasteful number, since it uses less digits than its factorization.

212012022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643536 (or 1643529 counting only the distinct ones).

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

Adding to 212012022100 its reverse (1220210212), we get a palindrome (213232232312).

The spelling of 212012022100 in words is "two hundred twelve billion, twelve million, twenty-two thousand, one hundred".