201111100000 has 72 divisors (see below), whose sum is σ = 494890418736. Its totient is φ = 80444400000.

The previous prime is 201111099997. The next prime is 201111100007. The reversal of 201111100000 is 1111102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111100007) 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, 905556 + ... + 1105555.

It is an arithmetic number, because the mean of its divisors is an integer number (6873478038).

Almost surely, 2^201111100000 is an apocalyptic number.

201111100000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201111100000 is an abundant number, since it is smaller than the sum of its proper divisors (293779318736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201111100000 is an frugal number, since it uses more digits than its factorization.

201111100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011146 (or 2011118 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 201111100000 its reverse (1111102), we get a palindrome (201112211102).

The spelling of 201111100000 in words is "two hundred one billion, one hundred eleven million, one hundred thousand".