210021100102 has 32 divisors (see below), whose sum is σ = 348565939200. Its totient is φ = 94108185600.

The previous prime is 210021100067. The next prime is 210021100123. The reversal of 210021100102 is 201001120012.

210021100102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1019799 + ... + 1208317.

It is an arithmetic number, because the mean of its divisors is an integer number (10892685600).

Almost surely, 2^210021100102 is an apocalyptic number.

210021100102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

210021100102 is a deficient number, since it is larger than the sum of its proper divisors (138544839098).

210021100102 is a wasteful number, since it uses less digits than its factorization.

210021100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189252.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210021100102 its reverse (201001120012), we get a palindrome (411022220114).

The spelling of 210021100102 in words is "two hundred ten billion, twenty-one million, one hundred thousand, one hundred two".