201111000000012 has 60 divisors (see below), whose sum is σ = 525975793275240. Its totient is φ = 67007428956864.

The previous prime is 201110999999953. The next prime is 201111000000059. The reversal of 201111000000012 is 210000000111102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 201110999999940 and 201111000000003.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 136167337 + ... + 137636352.

It is an arithmetic number, because the mean of its divisors is an integer number (8766263221254).

Almost surely, 2^{201111000000012} is an apocalyptic number.

It is an amenable number.

201111000000012 is an abundant number, since it is smaller than the sum of its proper divisors (324864793275228).

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

201111000000012 is a wasteful number, since it uses less digits than its factorization.

201111000000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273805972 (or 273805961 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 201111000000012 its reverse (210000000111102), we get a palindrome (411111000111114).

The spelling of 201111000000012 in words is "two hundred one trillion, one hundred eleven billion, twelve", and thus it is an aban number.