20002000211111 has 4 divisors (see below), whose sum is σ = 20002015432224. Its totient is φ = 20001984990000.

The previous prime is 20002000211051. The next prime is 20002000211113. The reversal of 20002000211111 is 11111200020002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002000211111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002000211092 and 20002000211101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002000211113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5431430 + ... + 8336931.

It is an arithmetic number, because the mean of its divisors is an integer number (5000503858056).

Almost surely, 2^{20002000211111} is an apocalyptic number.

20002000211111 is a deficient number, since it is larger than the sum of its proper divisors (15221113).

20002000211111 is a wasteful number, since it uses less digits than its factorization.

20002000211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15221112.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20002000211111 its reverse (11111200020002), we get a palindrome (31113200231113).

It can be divided in two parts, 200020002 and 11111, that multiplied together give a palindrome (2222422242222).

The spelling of 20002000211111 in words is "twenty trillion, two billion, two hundred eleven thousand, one hundred eleven".