20110101101 has 4 divisors (see below), whose sum is σ = 20385582012. Its totient is φ = 19834620192.

The previous prime is 20110101071. The next prime is 20110101103. The reversal of 20110101101 is 10110101102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10110101102 = 2 ⋅5055050551.

It can be written as a sum of positive squares in 2 ways, for example, as 4566245476 + 15543855625 = 67574^2 + 124675^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110101101 - 2¹⁰ = 20110100077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110101103) 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, 137740346 + ... + 137740491.

It is an arithmetic number, because the mean of its divisors is an integer number (5096395503).

Almost surely, 2^20110101101 is an apocalyptic number.

It is an amenable number.

20110101101 is a deficient number, since it is larger than the sum of its proper divisors (275480911).

20110101101 is an equidigital number, since it uses as much as digits as its factorization.

20110101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275480910.

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

Adding to 20110101101 its reverse (10110101102), we get a palindrome (30220202203).

Subtracting from 20110101101 its reverse (10110101102), we obtain a palindrome (9999999999).

The spelling of 20110101101 in words is "twenty billion, one hundred ten million, one hundred one thousand, one hundred one".