21102222110202 has 24 divisors (see below), whose sum is σ = 48127874988960. Its totient is φ = 6663859613640.

The previous prime is 21102222110161. The next prime is 21102222110209. The reversal of 21102222110202 is 20201122220112.

It is a happy number.

21102222110202 is a `hidden beast` number, since 21 + 10 + 222 + 211 + 0 + 202 = 666.

It is a super-3 number, since 3×21102222110202³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21102222110209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30851201574 + ... + 30851202257.

It is an arithmetic number, because the mean of its divisors is an integer number (2005328124540).

Almost surely, 2^{21102222110202} is an apocalyptic number.

21102222110202 is an abundant number, since it is smaller than the sum of its proper divisors (27025652878758).

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

21102222110202 is a wasteful number, since it uses less digits than its factorization.

21102222110202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61702403858 (or 61702403855 counting only the distinct ones).

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

Adding to 21102222110202 its reverse (20201122220112), we get a palindrome (41303344330314).

The spelling of 21102222110202 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-two million, one hundred ten thousand, two hundred two".