21220102002 has 16 divisors (see below), whose sum is σ = 46298404512. Its totient is φ = 6430333920.

The previous prime is 21220101979. The next prime is 21220102019. The reversal of 21220102002 is 20020102212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160758283 + ... + 160758414.

It is an arithmetic number, because the mean of its divisors is an integer number (2893650282).

Almost surely, 2^21220102002 is an apocalyptic number.

21220102002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220102002 is an abundant number, since it is smaller than the sum of its proper divisors (25078302510).

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

21220102002 is a wasteful number, since it uses less digits than its factorization.

21220102002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321516713.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21220102002 its reverse (20020102212), we get a palindrome (41240204214).

The spelling of 21220102002 in words is "twenty-one billion, two hundred twenty million, one hundred two thousand, two".