20201211311101 has 4 divisors (see below), whose sum is σ = 20201607518652. Its totient is φ = 20200815103552.

The previous prime is 20201211311063. The next prime is 20201211311117. The reversal of 20201211311101 is 10111311210202.

It is a happy number.

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 7151741427076 + 13049469884025 = 2674274^2 + 3612405^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201211311101 - 2²¹ = 20201209213949 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 (20201211311131) 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, 198027286 + ... + 198129271.

It is an arithmetic number, because the mean of its divisors is an integer number (5050401879663).

Almost surely, 2^{20201211311101} is an apocalyptic number.

It is an amenable number.

20201211311101 is a deficient number, since it is larger than the sum of its proper divisors (396207551).

20201211311101 is an equidigital number, since it uses as much as digits as its factorization.

20201211311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396207550.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 20201211311101 its reverse (10111311210202), we get a palindrome (30312522521303).

The spelling of 20201211311101 in words is "twenty trillion, two hundred one billion, two hundred eleven million, three hundred eleven thousand, one hundred one".