210021210102 has 32 divisors (see below), whose sum is σ = 458297846784. Its totient is φ = 63633103200.

The previous prime is 210021210101. The next prime is 210021210107. The reversal of 210021210102 is 201012120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021210101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200763 + ... + 678489.

It is an arithmetic number, because the mean of its divisors is an integer number (14321807712).

Almost surely, 2^210021210102 is an apocalyptic number.

210021210102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

210021210102 is an abundant number, since it is smaller than the sum of its proper divisors (248276636682).

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

210021210102 is a wasteful number, since it uses less digits than its factorization.

210021210102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484404.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210021210102 its reverse (201012120012), we get a palindrome (411033330114).

The spelling of 210021210102 in words is "two hundred ten billion, twenty-one million, two hundred ten thousand, one hundred two".