2021212000000 has 252 divisors, whose sum is σ = 5094045889128. Its totient is φ = 800320000000.

The previous prime is 2021211999997. The next prime is 2021212000009. The reversal of 2021212000000 is 2121202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021212000009) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 403997499 + ... + 404002501.

It is an arithmetic number, because the mean of its divisors is an integer number (20214467814).

Almost surely, 2^{2021212000000} is an apocalyptic number.

2021212000000 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 2021212000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2547022944564).

2021212000000 is an abundant number, since it is smaller than the sum of its proper divisors (3072833889128).

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

2021212000000 is an frugal number, since it uses more digits than its factorization.

2021212000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150 (or 5111 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2021212000000 its reverse (2121202), we get a palindrome (2021214121202).

The spelling of 2021212000000 in words is "two trillion, twenty-one billion, two hundred twelve million", and thus it is an aban number.