20011002111111 has 8 divisors (see below), whose sum is σ = 29106912161664. Its totient is φ = 12127880067320.

The previous prime is 20011002111077. The next prime is 20011002111187. The reversal of 20011002111111 is 11111120011002.

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 20011002111111 - 2⁹ = 20011002110599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011002111011) 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, 303197001651 + ... + 303197001716.

It is an arithmetic number, because the mean of its divisors is an integer number (3638364020208).

Almost surely, 2^{20011002111111} is an apocalyptic number.

20011002111111 is a deficient number, since it is larger than the sum of its proper divisors (9095910050553).

20011002111111 is a wasteful number, since it uses less digits than its factorization.

20011002111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606394003381.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 20011002111111 its reverse (11111120011002), we get a palindrome (31122122122113).

It can be divided in two parts, 20011002 and 111111, that multiplied together give a palindrome (2223442443222).

The spelling of 20011002111111 in words is "twenty trillion, eleven billion, two million, one hundred eleven thousand, one hundred eleven".