212021031200 has 144 divisors (see below), whose sum is σ = 574222309920. Its totient is φ = 75791616000.

The previous prime is 212021031199. The next prime is 212021031223. The reversal of 212021031200 is 2130120212.

It is a happy number.

It is a super-2 number, since 2×212021031200² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315020 + ... + 723380.

It is an arithmetic number, because the mean of its divisors is an integer number (3987654930).

Almost surely, 2^212021031200 is an apocalyptic number.

212021031200 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 212021031200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287111154960).

212021031200 is an abundant number, since it is smaller than the sum of its proper divisors (362201278720).

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

212021031200 is a wasteful number, since it uses less digits than its factorization.

212021031200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408451 (or 408438 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 212021031200 its reverse (2130120212), we get a palindrome (214151151412).

The spelling of 212021031200 in words is "two hundred twelve billion, twenty-one million, thirty-one thousand, two hundred".