20111120106 has 32 divisors (see below), whose sum is σ = 50147209728. Its totient is φ = 5223667440.

The previous prime is 20111120083. The next prime is 20111120111. The reversal of 20111120106 is 60102111102.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21764820 + ... + 21765743.

It is an arithmetic number, because the mean of its divisors is an integer number (1567100304).

Almost surely, 2^20111120106 is an apocalyptic number.

20111120106 is an abundant number, since it is smaller than the sum of its proper divisors (30036089622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111120106 is a wasteful number, since it uses less digits than its factorization.

20111120106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43530586.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 20111120106 its reverse (60102111102), we get a palindrome (80213231208).

The spelling of 20111120106 in words is "twenty billion, one hundred eleven million, one hundred twenty thousand, one hundred six".