210022021021220 has 96 divisors (see below), whose sum is σ = 471152129093856. Its totient is φ = 78362525696000.

The previous prime is 210022021021217. The next prime is 210022021021223. The reversal of 210022021021220 is 22120120220012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (210022021021217) and next prime (210022021021223).

It can be written as a sum of positive squares in 16 ways, for example, as 26206290547264 + 183815730473956 = 5119208^2 + 13557866^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (210022021021223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 649174700 + ... + 649498140.

It is an arithmetic number, because the mean of its divisors is an integer number (4907834678061).

Almost surely, 2^{210022021021220} is an apocalyptic number.

210022021021220 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 210022021021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235576064546928).

210022021021220 is an abundant number, since it is smaller than the sum of its proper divisors (261130108072636).

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

210022021021220 is a wasteful number, since it uses less digits than its factorization.

210022021021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340481 (or 340479 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210022021021220 its reverse (22120120220012), we get a palindrome (232142141241232).

The spelling of 210022021021220 in words is "two hundred ten trillion, twenty-two billion, twenty-one million, twenty-one thousand, two hundred twenty".