21112221112 has 16 divisors (see below), whose sum is σ = 39674778840. Its totient is φ = 10532280096.

The previous prime is 21112221101. The next prime is 21112221131.

21112221112 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2975043 + ... + 2982130.

Almost surely, 2^21112221112 is an apocalyptic number.

It is an amenable number.

21112221112 is a deficient number, since it is larger than the sum of its proper divisors (18562557728).

21112221112 is a wasteful number, since it uses less digits than its factorization.

21112221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5957622 (or 5957618 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

The spelling of 21112221112 in words is "twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twelve".