212122322300 has 144 divisors (see below), whose sum is σ = 538998835200. Its totient is φ = 70949399040.

The previous prime is 212122322299. The next prime is 212122322333. The reversal of 212122322300 is 3223221212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10287401 + ... + 10307999.

Almost surely, 2^212122322300 is an apocalyptic number.

212122322300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212122322300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269499417600).

212122322300 is an abundant number, since it is smaller than the sum of its proper divisors (326876512900).

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

212122322300 is a wasteful number, since it uses less digits than its factorization.

212122322300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20980 (or 20973 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 212122322300 its reverse (3223221212), we get a palindrome (215345543512).

The spelling of 212122322300 in words is "two hundred twelve billion, one hundred twenty-two million, three hundred twenty-two thousand, three hundred".