201211311101 has 4 divisors (see below), whose sum is σ = 203091790752. Its totient is φ = 199330831452.

The previous prime is 201211311083. The next prime is 201211311121. The reversal of 201211311101 is 101113112102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201211311101 - 2¹⁰ = 201211310077 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 (201211311121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 940239665 + ... + 940239878.

It is an arithmetic number, because the mean of its divisors is an integer number (50772947688).

Almost surely, 2^201211311101 is an apocalyptic number.

It is an amenable number.

201211311101 is a deficient number, since it is larger than the sum of its proper divisors (1880479651).

201211311101 is a wasteful number, since it uses less digits than its factorization.

201211311101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880479650.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 201211311101 its reverse (101113112102), we get a palindrome (302324423203).

The spelling of 201211311101 in words is "two hundred one billion, two hundred eleven million, three hundred eleven thousand, one hundred one".