20001210110111 has 16 divisors (see below), whose sum is σ = 21282129760320. Its totient is φ = 18732009246720.

The previous prime is 20001210110081. The next prime is 20001210110129. The reversal of 20001210110111 is 11101101210002.

It is a cyclic number.

It is not a de Polignac number, because 20001210110111 - 2²⁶ = 20001143001247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001210110092 and 20001210110101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001210710111) 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, 3387350 + ... + 7174716.

It is an arithmetic number, because the mean of its divisors is an integer number (1330133110020).

Almost surely, 2^{20001210110111} is an apocalyptic number.

20001210110111 is a deficient number, since it is larger than the sum of its proper divisors (1280919650209).

20001210110111 is a wasteful number, since it uses less digits than its factorization.

20001210110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788914.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20001210110111 its reverse (11101101210002), we get a palindrome (31102311320113).

The spelling of 20001210110111 in words is "twenty trillion, one billion, two hundred ten million, one hundred ten thousand, one hundred eleven".