201031011111 has 8 divisors (see below), whose sum is σ = 306332969344. Its totient is φ = 114874863480.

The previous prime is 201031011109. The next prime is 201031011119. The reversal of 201031011111 is 111110130102.

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

It is not a de Polignac number, because 201031011111 - 2¹ = 201031011109 is a prime.

It is a super-2 number, since 2×201031011111² (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 (201031011119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4786452625 + ... + 4786452666.

It is an arithmetic number, because the mean of its divisors is an integer number (38291621168).

Almost surely, 2^201031011111 is an apocalyptic number.

201031011111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201031011111 is a deficient number, since it is larger than the sum of its proper divisors (105301958233).

201031011111 is an equidigital number, since it uses as much as digits as its factorization.

201031011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9572905301.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 201031011111 its reverse (111110130102), we get a palindrome (312141141213).

The spelling of 201031011111 in words is "two hundred one billion, thirty-one million, eleven thousand, one hundred eleven".