210021001221200 has 720 divisors, whose sum is σ = 566793724129920. Its totient is φ = 74314880839680.

The previous prime is 210021001221181. The next prime is 210021001221203. The reversal of 210021001221200 is 2122100120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021001221203) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 171726083789 + ... + 171726085011.

It is an arithmetic number, because the mean of its divisors is an integer number (787213505736).

Almost surely, 2^{210021001221200} is an apocalyptic number.

210021001221200 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 210021001221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283396862064960).

210021001221200 is an abundant number, since it is smaller than the sum of its proper divisors (356772722908720).

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

210021001221200 is a wasteful number, since it uses less digits than its factorization.

210021001221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604 (or 1534 counting only the distinct ones).

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

Adding to 210021001221200 its reverse (2122100120012), we get a palindrome (212143101341212).

The spelling of 210021001221200 in words is "two hundred ten trillion, twenty-one billion, one million, two hundred twenty-one thousand, two hundred".