21010020212102 has 16 divisors (see below), whose sum is σ = 32057066711040. Its totient is φ = 10325523908232.

The previous prime is 21010020212053. The next prime is 21010020212183. The reversal of 21010020212102 is 20121202001012.

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, 298114568 + ... + 298185035.

It is an arithmetic number, because the mean of its divisors is an integer number (2003566669440).

Almost surely, 2^{21010020212102} is an apocalyptic number.

21010020212102 is a deficient number, since it is larger than the sum of its proper divisors (11047046498938).

21010020212102 is a wasteful number, since it uses less digits than its factorization.

21010020212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596299907.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21010020212102 its reverse (20121202001012), we get a palindrome (41131222213114).

The spelling of 21010020212102 in words is "twenty-one trillion, ten billion, twenty million, two hundred twelve thousand, one hundred two".