20111201005 has 8 divisors (see below), whose sum is σ = 27581075712. Its totient is φ = 13790537808.

The previous prime is 20111200987. The next prime is 20111201009. The reversal of 20111201005 is 50010211102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111201005 - 2¹¹ = 20111198957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111201009) 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 7 ways as a sum of consecutive naturals, for example, 287302837 + ... + 287302906.

It is an arithmetic number, because the mean of its divisors is an integer number (3447634464).

Almost surely, 2^20111201005 is an apocalyptic number.

It is an amenable number.

20111201005 is a deficient number, since it is larger than the sum of its proper divisors (7469874707).

20111201005 is an equidigital number, since it uses as much as digits as its factorization.

20111201005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574605755.

The product of its (nonzero) digits is 20, while the sum is 13.

Adding to 20111201005 its reverse (50010211102), we get a palindrome (70121412107).

The spelling of 20111201005 in words is "twenty billion, one hundred eleven million, two hundred one thousand, five".