21000100222 has 8 divisors (see below), whose sum is σ = 31531066200. Its totient is φ = 10489744824.

The previous prime is 21000100213. The next prime is 21000100237. The reversal of 21000100222 is 22200100012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21000100199 and 21000100208.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5150097 + ... + 5154172.

It is an arithmetic number, because the mean of its divisors is an integer number (3941383275).

Almost surely, 2^21000100222 is an apocalyptic number.

21000100222 is a deficient number, since it is larger than the sum of its proper divisors (10530965978).

21000100222 is a wasteful number, since it uses less digits than its factorization.

21000100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10305290.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21000100222 its reverse (22200100012), we get a palindrome (43200200234).

The spelling of 21000100222 in words is "twenty-one billion, one hundred thousand, two hundred twenty-two".