210101100210 has 64 divisors (see below), whose sum is σ = 560694677760. Its totient is φ = 55984452480.

The previous prime is 210101100203. The next prime is 210101100229. The reversal of 210101100210 is 12001101012.

It is a happy number.

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 = 210101100192 and 210101100201.

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 31 ways as a sum of consecutive naturals, for example, 62139 + ... + 651201.

It is an arithmetic number, because the mean of its divisors is an integer number (8760854340).

Almost surely, 2^210101100210 is an apocalyptic number.

210101100210 is an abundant number, since it is smaller than the sum of its proper divisors (350593577550).

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

210101100210 is a wasteful number, since it uses less digits than its factorization.

210101100210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590400 (or 590394 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 210101100210 its reverse (12001101012), we get a palindrome (222102201222).

The spelling of 210101100210 in words is "two hundred ten billion, one hundred one million, one hundred thousand, two hundred ten".