21010010020102 has 32 divisors (see below), whose sum is σ = 33760572065280. Its totient is φ = 9776857891680.

The previous prime is 21010010020057. The next prime is 21010010020123. The reversal of 21010010020102 is 20102001001012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10308349 + ... + 12177112.

It is an arithmetic number, because the mean of its divisors is an integer number (1055017877040).

Almost surely, 2^{21010010020102} is an apocalyptic number.

21010010020102 is a deficient number, since it is larger than the sum of its proper divisors (12750562045178).

21010010020102 is a wasteful number, since it uses less digits than its factorization.

21010010020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22485916.

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

Adding to 21010010020102 its reverse (20102001001012), we get a palindrome (41112011021114).

The spelling of 21010010020102 in words is "twenty-one trillion, ten billion, ten million, twenty thousand, one hundred two".