201111111013 has 8 divisors (see below), whose sum is σ = 208076005080. Its totient is φ = 194148218880.

The previous prime is 201111110987. The next prime is 201111111017. The reversal of 201111111013 is 310111111102.

It can be written as a sum of positive squares in 4 ways, for example, as 25262559364 + 175848551649 = 158942^2 + 419343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201111111013 - 2³⁷ = 63672157541 is a prime.

It is a super-3 number, since 3×201111111013³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201111110984 and 201111111002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111111017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294648 + ... + 699313.

It is an arithmetic number, because the mean of its divisors is an integer number (26009500635).

Almost surely, 2^201111111013 is an apocalyptic number.

It is an amenable number.

201111111013 is a deficient number, since it is larger than the sum of its proper divisors (6964894067).

201111111013 is an equidigital number, since it uses as much as digits as its factorization.

201111111013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000967.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 201111111013 its reverse (310111111102), we get a palindrome (511222222115).

The spelling of 201111111013 in words is "two hundred one billion, one hundred eleven million, one hundred eleven thousand, thirteen".