20112222111 has 8 divisors (see below), whose sum is σ = 26869610880. Its totient is φ = 13381490712.

The previous prime is 20112222089. The next prime is 20112222149. The reversal of 20112222111 is 11122221102.

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

It is not a de Polignac number, because 20112222111 - 2⁹ = 20112221599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112222211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6662581 + ... + 6665598.

It is an arithmetic number, because the mean of its divisors is an integer number (3358701360).

Almost surely, 2^20112222111 is an apocalyptic number.

20112222111 is a deficient number, since it is larger than the sum of its proper divisors (6757388769).

20112222111 is a wasteful number, since it uses less digits than its factorization.

20112222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13328685.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20112222111 its reverse (11122221102), we get a palindrome (31234443213).

The spelling of 20112222111 in words is "twenty billion, one hundred twelve million, two hundred twenty-two thousand, one hundred eleven".