21210110012102 has 16 divisors (see below), whose sum is σ = 34707769704000. Its totient is φ = 9640871052840.

The previous prime is 21210110012089. The next prime is 21210110012167. The reversal of 21210110012102 is 20121001101212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1906952 + ... + 6786507.

It is an arithmetic number, because the mean of its divisors is an integer number (2169235606500).

Almost surely, 2^{21210110012102} is an apocalyptic number.

21210110012102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210110012102 is a deficient number, since it is larger than the sum of its proper divisors (13497659691898).

21210110012102 is a wasteful number, since it uses less digits than its factorization.

21210110012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8804371.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21210110012102 its reverse (20121001101212), we get a palindrome (41331111113314).

The spelling of 21210110012102 in words is "twenty-one trillion, two hundred ten billion, one hundred ten million, twelve thousand, one hundred two".