201111121112 has 64 divisors (see below), whose sum is σ = 434015971200. Its totient is φ = 86402557440.

The previous prime is 201111121109. The next prime is 201111121121. The reversal of 201111121112 is 211121111102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585083 + ... + 862869.

It is an arithmetic number, because the mean of its divisors is an integer number (6781499550).

Almost surely, 2^201111121112 is an apocalyptic number.

201111121112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201111121112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217007985600).

201111121112 is an abundant number, since it is smaller than the sum of its proper divisors (232904850088).

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

201111121112 is a wasteful number, since it uses less digits than its factorization.

201111121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278256 (or 278252 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 201111121112 its reverse (211121111102), we get a palindrome (412232232214).

It can be divided in two parts, 201111 and 121112, that added together give a palindrome (322223).

The spelling of 201111121112 in words is "two hundred one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred twelve".