20101110101 has 2 divisors, whose sum is σ = 20101110102. Its totient is φ = 20101110100.

The previous prime is 20101110091. The next prime is 20101110109. The reversal of 20101110101 is 10101110102.

It is a happy number.

It is an a-pointer prime, because the next prime (20101110109) can be obtained adding 20101110101 to its sum of digits (8).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18968451076 + 1132659025 = 137726^2 + 33655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20101110101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101110109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050555050 + 10050555051.

It is an arithmetic number, because the mean of its divisors is an integer number (10050555051).

Almost surely, 2^20101110101 is an apocalyptic number.

It is an amenable number.

20101110101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101110101 is an equidigital number, since it uses as much as digits as its factorization.

20101110101 is an evil number, because the sum of its binary digits is even.

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

Adding to 20101110101 its reverse (10101110102), we get a palindrome (30202220203).

Subtracting from 20101110101 its reverse (10101110102), we obtain a palindrome (9999999999).

It can be divided in two parts, 201011 and 10101, that added together give a palindrome (211112).

The spelling of 20101110101 in words is "twenty billion, one hundred one million, one hundred ten thousand, one hundred one".