1021200210 has 96 divisors (see below), whose sum is σ = 2778572160. Its totient is φ = 269837568.

The previous prime is 1021200209. The next prime is 1021200241. The reversal of 1021200210 is 120021201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1021200192 and 1021200201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 272731 + ... + 276449.

It is an arithmetic number, because the mean of its divisors is an integer number (28943460).

Almost surely, 2^1021200210 is an apocalyptic number.

1021200210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021200210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1389286080).

1021200210 is an abundant number, since it is smaller than the sum of its proper divisors (1757371950).

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

1021200210 is a wasteful number, since it uses less digits than its factorization.

1021200210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854 (or 3842 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1021200210 is about 31956.2233375598. The cubic root of 1021200210 is about 1007.0173778873.

Adding to 1021200210 its reverse (120021201), we get a palindrome (1141221411).

The spelling of 1021200210 in words is "one billion, twenty-one million, two hundred thousand, two hundred ten".