20122220111 has 16 divisors (see below), whose sum is σ = 23826969600. Its totient is φ = 16626865248.

The previous prime is 20122220077. The next prime is 20122220117. The reversal of 20122220111 is 11102222102.

It is not a de Polignac number, because 20122220111 - 2³⁰ = 19048478287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122220117) 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 15 ways as a sum of consecutive naturals, for example, 53450 + ... + 207608.

It is an arithmetic number, because the mean of its divisors is an integer number (1489185600).

Almost surely, 2^20122220111 is an apocalyptic number.

20122220111 is a deficient number, since it is larger than the sum of its proper divisors (3704749489).

20122220111 is a wasteful number, since it uses less digits than its factorization.

20122220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154838.

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

Adding to 20122220111 its reverse (11102222102), we get a palindrome (31224442213).

The spelling of 20122220111 in words is "twenty billion, one hundred twenty-two million, two hundred twenty thousand, one hundred eleven".