221100021002 has 64 divisors (see below), whose sum is σ = 403120226304. Its totient is φ = 88954225920.

The previous prime is 221100021001. The next prime is 221100021041. The reversal of 221100021002 is 200120001122.

It is a happy number.

221100021002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221100021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2257013 + ... + 2352935.

It is an arithmetic number, because the mean of its divisors is an integer number (6298753536).

Almost surely, 2^221100021002 is an apocalyptic number.

221100021002 is a deficient number, since it is larger than the sum of its proper divisors (182020205302).

221100021002 is a wasteful number, since it uses less digits than its factorization.

221100021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96123.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221100021002 its reverse (200120001122), we get a palindrome (421220022124).

The spelling of 221100021002 in words is "two hundred twenty-one billion, one hundred million, twenty-one thousand, two".