20011111000001 has 16 divisors (see below), whose sum is σ = 21848526422016. Its totient is φ = 18176736690000.

The previous prime is 20011110999959. The next prime is 20011111000019. The reversal of 20011111000001 is 10000011111002.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011111000001 is a prime.

It is a super-2 number, since 2×20011111000001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011111000051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108174656 + ... + 108359486.

It is an arithmetic number, because the mean of its divisors is an integer number (1365532901376).

Almost surely, 2^{20011111000001} is an apocalyptic number.

It is an amenable number.

20011111000001 is a deficient number, since it is larger than the sum of its proper divisors (1837415422015).

20011111000001 is a wasteful number, since it uses less digits than its factorization.

20011111000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193004.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 20011111000001 its reverse (10000011111002), we get a palindrome (30011122111003).

The spelling of 20011111000001 in words is "twenty trillion, eleven billion, one hundred eleven million, one", and thus it is an aban number.