20011311101 has 2 divisors, whose sum is σ = 20011311102. Its totient is φ = 20011311100.

The previous prime is 20011311059. The next prime is 20011311121. The reversal of 20011311101 is 10111311002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19803807076 + 207504025 = 140726^2 + 14405^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011311101 - 2¹⁴ = 20011294717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011311121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005655550 + 10005655551.

It is an arithmetic number, because the mean of its divisors is an integer number (10005655551).

Almost surely, 2^20011311101 is an apocalyptic number.

It is an amenable number.

20011311101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011311101 is an equidigital number, since it uses as much as digits as its factorization.

20011311101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 20011311101 its reverse (10111311002), we get a palindrome (30122622103).

Subtracting from 20011311101 its reverse (10111311002), we obtain a palindrome (9900000099).

The spelling of 20011311101 in words is "twenty billion, eleven million, three hundred eleven thousand, one hundred one".