20002000011111 has 6 divisors (see below), whose sum is σ = 28891777793840. Its totient is φ = 13334666674068.

The previous prime is 20002000011107. The next prime is 20002000011121. The reversal of 20002000011111 is 11111000020002.

It is a happy number.

It is not a de Polignac number, because 20002000011111 - 2² = 20002000011107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2222444445679 = 20002000011111 / (2 + 0 + 0 + 0 + 2 + 0 + 0 + 0 + 0 + 1 + 1 + 1 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002000011093 and 20002000011102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002000011121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111222222831 + ... + 1111222222848.

Almost surely, 2^{20002000011111} is an apocalyptic number.

20002000011111 is a deficient number, since it is larger than the sum of its proper divisors (8889777782729).

20002000011111 is a wasteful number, since it uses less digits than its factorization.

20002000011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222444445685 (or 2222444445682 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20002000011111 its reverse (11111000020002), we get a palindrome (31113000031113).

The spelling of 20002000011111 in words is "twenty trillion, two billion, eleven thousand, one hundred eleven".