21210102222102 has 12 divisors (see below), whose sum is σ = 45955221481260. Its totient is φ = 7070034074028.

The previous prime is 21210102222013. The next prime is 21210102222139. The reversal of 21210102222102 is 20122220101212.

It is a happy number.

21210102222102 is a `hidden beast` number, since 21 + 210 + 1 + 0 + 222 + 210 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1178339012339 = 21210102222102 / (2 + 1 + 2 + 1 + 0 + 1 + 0 + 2 + 2 + 2 + 2 + 1 + 0 + 2).

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 5 ways as a sum of consecutive naturals, for example, 589169506152 + ... + 589169506187.

It is an arithmetic number, because the mean of its divisors is an integer number (3829601790105).

Almost surely, 2^{21210102222102} is an apocalyptic number.

21210102222102 is an abundant number, since it is smaller than the sum of its proper divisors (24745119259158).

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

21210102222102 is a wasteful number, since it uses less digits than its factorization.

21210102222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178339012347 (or 1178339012344 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21210102222102 its reverse (20122220101212), we get a palindrome (41332322323314).

The spelling of 21210102222102 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, two hundred twenty-two thousand, one hundred two".