111212020121012 has 12 divisors (see below), whose sum is σ = 194669436392676. Its totient is φ = 55592181151680.

The previous prime is 111212020120997. The next prime is 111212020121029. The reversal of 111212020121012 is 210121020212111.

It can be written as a sum of positive squares in 2 ways, for example, as 49714993384996 + 61497026736016 = 7050886^2 + 7842004^2 .

It is a super-3 number, since 3×111212020121012³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3457209113 + ... + 3457241280.

It is an arithmetic number, because the mean of its divisors is an integer number (16222453032723).

Almost surely, 2^{111212020121012} is an apocalyptic number.

It is an amenable number.

111212020121012 is a deficient number, since it is larger than the sum of its proper divisors (83457416271664).

111212020121012 is a wasteful number, since it uses less digits than its factorization.

111212020121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6914454418 (or 6914454416 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111212020121012 its reverse (210121020212111), we get a palindrome (321333040333123).

The spelling of 111212020121012 in words is "one hundred eleven trillion, two hundred twelve billion, twenty million, one hundred twenty-one thousand, twelve".