20000111211 has 24 divisors (see below), whose sum is σ = 29212674816. Its totient is φ = 13184426160.

The previous prime is 20000111191. The next prime is 20000111221. The reversal of 20000111211 is 11211100002.

It is a happy number.

It is not a de Polignac number, because 20000111211 - 2⁹ = 20000110699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20000111193 and 20000111202.

It is not an unprimeable number, because it can be changed into a prime (20000111221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 624946 + ... + 656168.

It is an arithmetic number, because the mean of its divisors is an integer number (1217194784).

Almost surely, 2^20000111211 is an apocalyptic number.

20000111211 is a deficient number, since it is larger than the sum of its proper divisors (9212563605).

20000111211 is a wasteful number, since it uses less digits than its factorization.

20000111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32023 (or 32020 counting only the distinct ones).

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

Adding to 20000111211 its reverse (11211100002), we get a palindrome (31211211213).

The spelling of 20000111211 in words is "twenty billion, one hundred eleven thousand, two hundred eleven".