21210100210104 has 32 divisors (see below), whose sum is σ = 57104115951120. Its totient is φ = 6526184679936.

The previous prime is 21210100210099. The next prime is 21210100210121. The reversal of 21210100210104 is 40101200101212.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33990544897 + ... + 33990545520.

Almost surely, 2^{21210100210104} is an apocalyptic number.

21210100210104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21210100210104 is an abundant number, since it is smaller than the sum of its proper divisors (35894015741016).

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

21210100210104 is a wasteful number, since it uses less digits than its factorization.

21210100210104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67981090439 (or 67981090435 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21210100210104 its reverse (40101200101212), we get a palindrome (61311300311316).

The spelling of 21210100210104 in words is "twenty-one trillion, two hundred ten billion, one hundred million, two hundred ten thousand, one hundred four".