210121333004220 has 384 divisors, whose sum is σ = 668751601351680. Its totient is φ = 48845134356480.

The previous prime is 210121333004197. The next prime is 210121333004227. The reversal of 210121333004220 is 22400333121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121333004227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 667070202 + ... + 667385118.

It is an arithmetic number, because the mean of its divisors is an integer number (1741540628520).

Almost surely, 2^{210121333004220} is an apocalyptic number.

210121333004220 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 210121333004220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334375800675840).

210121333004220 is an abundant number, since it is smaller than the sum of its proper divisors (458630268347460).

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

210121333004220 is a wasteful number, since it uses less digits than its factorization.

210121333004220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315373 (or 315371 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 210121333004220 its reverse (22400333121012), we get a palindrome (232521666125232).

The spelling of 210121333004220 in words is "two hundred ten trillion, one hundred twenty-one billion, three hundred thirty-three million, four thousand, two hundred twenty".