201111201101 has 6 divisors (see below), whose sum is σ = 213637158570. Its totient is φ = 189281130176.

The previous prime is 201111201089. The next prime is 201111201103. The reversal of 201111201101 is 101102111102.

It can be written as a sum of positive squares in 3 ways, for example, as 61608204100 + 139502997001 = 248210^2 + 373501^2 .

It is a de Polignac number, because none of the positive numbers 2^k-201111201101 is a prime.

It is a super-2 number, since 2×201111201101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111201103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 347942966 + ... + 347943543.

It is an arithmetic number, because the mean of its divisors is an integer number (35606193095).

Almost surely, 2^201111201101 is an apocalyptic number.

It is an amenable number.

201111201101 is a deficient number, since it is larger than the sum of its proper divisors (12525957469).

201111201101 is an equidigital number, since it uses as much as digits as its factorization.

201111201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695886543 (or 695886526 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 201111201101 its reverse (101102111102), we get a palindrome (302213312203).

The spelling of 201111201101 in words is "two hundred one billion, one hundred eleven million, two hundred one thousand, one hundred one".