20110101011 has 128 divisors (see below), whose sum is σ = 29775513600. Its totient is φ = 13099968000.

The previous prime is 20110100993. The next prime is 20110101061. The reversal of 20110101011 is 11010101102.

It is a happy number.

It is not a de Polignac number, because 20110101011 - 2¹⁸ = 20109838867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20110101011.

It is not an unprimeable number, because it can be changed into a prime (20110101061) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 199109861 + ... + 199109961.

It is an arithmetic number, because the mean of its divisors is an integer number (232621200).

Almost surely, 2^20110101011 is an apocalyptic number.

20110101011 is a deficient number, since it is larger than the sum of its proper divisors (9665412589).

20110101011 is a wasteful number, since it uses less digits than its factorization.

20110101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 20110101011 its reverse (11010101102), we get a palindrome (31120202113).

Subtracting from 20110101011 its reverse (11010101102), we obtain a palindrome (9099999909).

It can be divided in two parts, 20110 and 101011, that added together give a palindrome (121121).

The spelling of 20110101011 in words is "twenty billion, one hundred ten million, one hundred one thousand, eleven".