20001311101 has 4 divisors (see below), whose sum is σ = 20001937500. Its totient is φ = 20000684704.

The previous prime is 20001311093. The next prime is 20001311111. The reversal of 20001311101 is 10111310002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18029507076 + 1971804025 = 134274^2 + 44405^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001311101 - 2³ = 20001311093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001311111) 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, 262576 + ... + 330073.

It is an arithmetic number, because the mean of its divisors is an integer number (5000484375).

Almost surely, 2^20001311101 is an apocalyptic number.

It is an amenable number.

20001311101 is a deficient number, since it is larger than the sum of its proper divisors (626399).

20001311101 is an equidigital number, since it uses as much as digits as its factorization.

20001311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626398.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 20001311101 its reverse (10111310002), we get a palindrome (30112621103).

The spelling of 20001311101 in words is "twenty billion, one million, three hundred eleven thousand, one hundred one".