212221021100 has 36 divisors (see below), whose sum is σ = 502385038008. Its totient is φ = 77171280000.

The previous prime is 212221021099. The next prime is 212221021139. The reversal of 212221021100 is 1120122212.

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, 96463001 + ... + 96465200.

Almost surely, 2^212221021100 is an apocalyptic number.

212221021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221021100 is an abundant number, since it is smaller than the sum of its proper divisors (290164016908).

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

212221021100 is a wasteful number, since it uses less digits than its factorization.

212221021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192928226 (or 192928219 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212221021100 its reverse (1120122212), we get a palindrome (213341143312).

The spelling of 212221021100 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, one hundred".