21008000222 has 32 divisors (see below), whose sum is σ = 35896746240. Its totient is φ = 9127451520.

The previous prime is 21008000219. The next prime is 21008000227. The reversal of 21008000222 is 22200080012.

It is a self number, because there is not a number n which added to its sum of digits gives 21008000222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21008000227) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 739493 + ... + 767375.

It is an arithmetic number, because the mean of its divisors is an integer number (1121773320).

Almost surely, 2^21008000222 is an apocalyptic number.

21008000222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21008000222 is a deficient number, since it is larger than the sum of its proper divisors (14888746018).

21008000222 is a wasteful number, since it uses less digits than its factorization.

21008000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29408.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21008000222 its reverse (22200080012), we get a palindrome (43208080234).

The spelling of 21008000222 in words is "twenty-one billion, eight million, two hundred twenty-two", and thus it is an aban number.