21110012222 has 32 divisors (see below), whose sum is σ = 34526024064. Its totient is φ = 9622080000.

The previous prime is 21110012197. The next prime is 21110012239. The reversal of 21110012222 is 22221001112.

It is a junction number, because it is equal to n+sod(n) for n = 21110012197 and 21110012206.

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 15 ways as a sum of consecutive naturals, for example, 1043003 + ... + 1063049.

It is an arithmetic number, because the mean of its divisors is an integer number (1078938252).

Almost surely, 2^21110012222 is an apocalyptic number.

21110012222 is a deficient number, since it is larger than the sum of its proper divisors (13416011842).

21110012222 is a wasteful number, since it uses less digits than its factorization.

21110012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20564.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21110012222 its reverse (22221001112), we get a palindrome (43331013334).

It can be divided in two parts, 211100 and 12222, that added together give a palindrome (223322).

The spelling of 21110012222 in words is "twenty-one billion, one hundred ten million, twelve thousand, two hundred twenty-two".