20112111001 has 8 divisors (see below), whose sum is σ = 22029493320. Its totient is φ = 18276319488.

The previous prime is 20112110989. The next prime is 20112111109. The reversal of 20112111001 is 10011121102.

It can be written as a sum of positive squares in 4 ways, for example, as 3107951001 + 17004160000 = 55749^2 + 130400^2 .

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 20112111001 - 2⁵ = 20112110969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112141001) 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, 20397186 + ... + 20398171.

It is an arithmetic number, because the mean of its divisors is an integer number (2753686665).

Almost surely, 2^20112111001 is an apocalyptic number.

It is an amenable number.

20112111001 is a deficient number, since it is larger than the sum of its proper divisors (1917382319).

20112111001 is a wasteful number, since it uses less digits than its factorization.

20112111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40795403.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20112111001 its reverse (10011121102), we get a palindrome (30123232103).

The spelling of 20112111001 in words is "twenty billion, one hundred twelve million, one hundred eleven thousand, one".