210001220000 has 480 divisors, whose sum is σ = 613807818624. Its totient is φ = 69696000000.

The previous prime is 210001219937. The next prime is 210001220027. The reversal of 210001220000 is 22100012.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 210001220000.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 288859637 + ... + 288860363.

Almost surely, 2^210001220000 is an apocalyptic number.

210001220000 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 210001220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306903909312).

210001220000 is an abundant number, since it is smaller than the sum of its proper divisors (403806598624).

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

210001220000 is a wasteful number, since it uses less digits than its factorization.

210001220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 210001220000 its reverse (22100012), we get a palindrome (210023320012).

The spelling of 210001220000 in words is "two hundred ten billion, one million, two hundred twenty thousand".