21011010222 has 8 divisors (see below), whose sum is σ = 42022020456. Its totient is φ = 7003670072.

The previous prime is 21011010211. The next prime is 21011010239. The reversal of 21011010222 is 22201011012.

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

21011010222 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21011010198 and 21011010207.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1750917513 + ... + 1750917524.

It is an arithmetic number, because the mean of its divisors is an integer number (5252752557).

Almost surely, 2^21011010222 is an apocalyptic number.

21011010222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21011010222 is a wasteful number, since it uses less digits than its factorization.

21011010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501835042.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21011010222 its reverse (22201011012), we get a palindrome (43212021234).

The spelling of 21011010222 in words is "twenty-one billion, eleven million, ten thousand, two hundred twenty-two".