20111021200005 has 32 divisors (see below), whose sum is σ = 33223088037888. Its totient is φ = 10377548808000.

The previous prime is 20111021199989. The next prime is 20111021200031. The reversal of 20111021200005 is 50000212011102.

It is not a de Polignac number, because 20111021200005 - 2⁴ = 20111021199989 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2788689 + ... + 6928118.

It is an arithmetic number, because the mean of its divisors is an integer number (1038221501184).

Almost surely, 2^{20111021200005} is an apocalyptic number.

It is an amenable number.

20111021200005 is a deficient number, since it is larger than the sum of its proper divisors (13112066837883).

20111021200005 is a wasteful number, since it uses less digits than its factorization.

20111021200005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721297.

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

Adding to 20111021200005 its reverse (50000212011102), we get a palindrome (70111233211107).

The spelling of 20111021200005 in words is "twenty trillion, one hundred eleven billion, twenty-one million, two hundred thousand, five".