21102201002220 has 96 divisors (see below), whose sum is σ = 63640540035072. Its totient is φ = 5193629753088.

The previous prime is 21102201002189. The next prime is 21102201002237. The reversal of 21102201002220 is 2220010220112.

21102201002220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21102201002220.

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 31 ways as a sum of consecutive naturals, for example, 3382129 + ... + 7324151.

It is an arithmetic number, because the mean of its divisors is an integer number (662922292032).

Almost surely, 2^{21102201002220} is an apocalyptic number.

21102201002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102201002220 is an abundant number, since it is smaller than the sum of its proper divisors (42538339032852).

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

21102201002220 is a wasteful number, since it uses less digits than its factorization.

21102201002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948911 (or 3948909 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21102201002220 its reverse (2220010220112), we get a palindrome (23322211222332).

The spelling of 21102201002220 in words is "twenty-one trillion, one hundred two billion, two hundred one million, two thousand, two hundred twenty".