20110201111 has 32 divisors (see below), whose sum is σ = 27371086848. Its totient is φ = 14266679040.

The previous prime is 20110201079. The next prime is 20110201127. The reversal of 20110201111 is 11110201102.

It is a cyclic number.

It is not a de Polignac number, because 20110201111 - 2⁵ = 20110201079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110201411) 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 31 ways as a sum of consecutive naturals, for example, 64531 + ... + 210676.

It is an arithmetic number, because the mean of its divisors is an integer number (855346464).

Almost surely, 2^20110201111 is an apocalyptic number.

20110201111 is a deficient number, since it is larger than the sum of its proper divisors (7260885737).

20110201111 is a wasteful number, since it uses less digits than its factorization.

20110201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275311.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20110201111 its reverse (11110201102), we get a palindrome (31220402213).

Subtracting from 20110201111 its reverse (11110201102), we obtain a palindrome (9000000009).

The spelling of 20110201111 in words is "twenty billion, one hundred ten million, two hundred one thousand, one hundred eleven".