20021122005 has 16 divisors (see below), whose sum is σ = 32047261440. Its totient is φ = 10673443008.

The previous prime is 20021122001. The next prime is 20021122013. The reversal of 20021122005 is 50022112002.

It is not a de Polignac number, because 20021122005 - 2² = 20021122001 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021122001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243517 + ... + 315186.

It is an arithmetic number, because the mean of its divisors is an integer number (2002953840).

Almost surely, 2^20021122005 is an apocalyptic number.

It is an amenable number.

20021122005 is a deficient number, since it is larger than the sum of its proper divisors (12026139435).

20021122005 is a wasteful number, since it uses less digits than its factorization.

20021122005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561100.

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 20021122005 its reverse (50022112002), we get a palindrome (70043234007).

The spelling of 20021122005 in words is "twenty billion, twenty-one million, one hundred twenty-two thousand, five".