21111000222 has 32 divisors (see below), whose sum is σ = 45524183040. Its totient is φ = 6487930080.

The previous prime is 21111000203. The next prime is 21111000223. The reversal of 21111000222 is 22200011112.

21111000222 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21111000198 and 21111000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111000223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95854 + ... + 226737.

It is an arithmetic number, because the mean of its divisors is an integer number (1422630720).

Almost surely, 2^21111000222 is an apocalyptic number.

21111000222 is an abundant number, since it is smaller than the sum of its proper divisors (24413182818).

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

21111000222 is a wasteful number, since it uses less digits than its factorization.

21111000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323448.

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

Adding to 21111000222 its reverse (22200011112), we get a palindrome (43311011334).

The spelling of 21111000222 in words is "twenty-one billion, one hundred eleven million, two hundred twenty-two", and thus it is an aban number.