21210012100102 has 48 divisors (see below), whose sum is σ = 37068470964000. Its totient is φ = 9075484664064.

The previous prime is 21210012100073. The next prime is 21210012100159. The reversal of 21210012100102 is 20100121001212.

It is a super-2 number, since 2×21210012100102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164969799 + ... + 165098317.

It is an arithmetic number, because the mean of its divisors is an integer number (772259811750).

Almost surely, 2^{21210012100102} is an apocalyptic number.

21210012100102 is a deficient number, since it is larger than the sum of its proper divisors (15858458863898).

21210012100102 is a wasteful number, since it uses less digits than its factorization.

21210012100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131213 (or 131206 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21210012100102 its reverse (20100121001212), we get a palindrome (41310133101314).

The spelling of 21210012100102 in words is "twenty-one trillion, two hundred ten billion, twelve million, one hundred thousand, one hundred two".