210011201221220 has 144 divisors (see below), whose sum is σ = 517637882095488. Its totient is φ = 70105983267840.

The previous prime is 210011201221183. The next prime is 210011201221223. The reversal of 210011201221220 is 22122102110012.

It is not an unprimeable number, because it can be changed into a prime (210011201221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49478792 + ... + 53555328.

It is an arithmetic number, because the mean of its divisors is an integer number (3594707514552).

Almost surely, 2^{210011201221220} is an apocalyptic number.

210011201221220 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 210011201221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258818941047744).

210011201221220 is an abundant number, since it is smaller than the sum of its proper divisors (307626680874268).

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

210011201221220 is a wasteful number, since it uses less digits than its factorization.

210011201221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4076790 (or 4076735 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210011201221220 its reverse (22122102110012), we get a palindrome (232133303331232).

The spelling of 210011201221220 in words is "two hundred ten trillion, eleven billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty".