20111122005 has 16 divisors (see below), whose sum is σ = 34653010560. Its totient is φ = 9900859968.

The previous prime is 20111121991. The next prime is 20111122013. The reversal of 20111122005 is 50022111102.

It is not a de Polignac number, because 20111122005 - 2⁸ = 20111121749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent 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, 51566785 + ... + 51567174.

It is an arithmetic number, because the mean of its divisors is an integer number (2165813160).

Almost surely, 2^20111122005 is an apocalyptic number.

It is an amenable number.

20111122005 is a deficient number, since it is larger than the sum of its proper divisors (14541888555).

20111122005 is a wasteful number, since it uses less digits than its factorization.

20111122005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103133980.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 20111122005 its reverse (50022111102), we get a palindrome (70133233107).

The spelling of 20111122005 in words is "twenty billion, one hundred eleven million, one hundred twenty-two thousand, five".