201111111012 has 72 divisors (see below), whose sum is σ = 547902714240. Its totient is φ = 57246665280.

The previous prime is 201111110987. The next prime is 201111111017. The reversal of 201111111012 is 210111111102.

It is a Harshad number since it is a multiple of its sum of digits (12).

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 477564 + ... + 793907.

It is an arithmetic number, because the mean of its divisors is an integer number (7609759920).

Almost surely, 2^201111111012 is an apocalyptic number.

It is an amenable number.

201111111012 is an abundant number, since it is smaller than the sum of its proper divisors (346791603228).

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

201111111012 is a wasteful number, since it uses less digits than its factorization.

201111111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271761 (or 1271752 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 201111111012 its reverse (210111111102), we get a palindrome (411222222114).

The spelling of 201111111012 in words is "two hundred one billion, one hundred eleven million, one hundred eleven thousand, twelve".