2021100210 has 96 divisors (see below), whose sum is σ = 5415903792. Its totient is φ = 522547200.

The previous prime is 2021100197. The next prime is 2021100217. The reversal of 2021100210 is 120011202.

It can be written as a sum of positive squares in 8 ways, for example, as 670758201 + 1350342009 = 25899^2 + 36747^2 .

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 = 2021100192 and 2021100201.

It is not an unprimeable number, because it can be changed into a prime (2021100217) by changing a digit.

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, 1121310 + ... + 1123110.

Almost surely, 2^2021100210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021100210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2707951896).

2021100210 is an abundant number, since it is smaller than the sum of its proper divisors (3394803582).

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

2021100210 is a wasteful number, since it uses less digits than its factorization.

2021100210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188 (or 2185 counting only the distinct ones).

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

The square root of 2021100210 is about 44956.6481179369. The cubic root of 2021100210 is about 1264.3363253566.

Adding to 2021100210 its reverse (120011202), we get a palindrome (2141111412).

The spelling of 2021100210 in words is "two billion, twenty-one million, one hundred thousand, two hundred ten".