21000112222 has 8 divisors (see below), whose sum is σ = 31513677336. Its totient is φ = 10495553112.

The previous prime is 21000112207. The next prime is 21000112247. The reversal of 21000112222 is 22221100012.

It is a happy number.

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

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, 2245668 + ... + 2254999.

It is an arithmetic number, because the mean of its divisors is an integer number (3939209667).

Almost surely, 2^21000112222 is an apocalyptic number.

21000112222 is a deficient number, since it is larger than the sum of its proper divisors (10513565114).

21000112222 is a wasteful number, since it uses less digits than its factorization.

21000112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503002.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21000112222 its reverse (22221100012), we get a palindrome (43221212234).

The spelling of 21000112222 in words is "twenty-one billion, one hundred twelve thousand, two hundred twenty-two".