201031103111 has 12 divisors (see below), whose sum is σ = 205442486088. Its totient is φ = 196712544912.

The previous prime is 201031103107. The next prime is 201031103129. The reversal of 201031103111 is 111301130102.

It is a happy number.

It is not a de Polignac number, because 201031103111 - 2² = 201031103107 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 (201031103191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20023985 + ... + 20034021.

It is an arithmetic number, because the mean of its divisors is an integer number (17120207174).

Almost surely, 2^201031103111 is an apocalyptic number.

201031103111 is a deficient number, since it is larger than the sum of its proper divisors (4411382977).

201031103111 is an equidigital number, since it uses as much as digits as its factorization.

201031103111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19198 (or 19151 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 201031103111 its reverse (111301130102), we get a palindrome (312332233213).

The spelling of 201031103111 in words is "two hundred one billion, thirty-one million, one hundred three thousand, one hundred eleven".