111121220001012 has 192 divisors, whose sum is σ = 282482477727744. Its totient is φ = 33795043430400.

The previous prime is 111121220001007. The next prime is 111121220001049. The reversal of 111121220001012 is 210100022121111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111121220000982 and 111121220001000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10785321453 + ... + 10785331755.

It is an arithmetic number, because the mean of its divisors is an integer number (1471262904832).

Almost surely, 2^{111121220001012} is an apocalyptic number.

111121220001012 is a gapful number since it is divisible by the number (12) 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 111121220001012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141241238863872).

111121220001012 is an abundant number, since it is smaller than the sum of its proper divisors (171361257726732).

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

111121220001012 is a wasteful number, since it uses less digits than its factorization.

111121220001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12718 (or 12716 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111121220001012 its reverse (210100022121111), we get a palindrome (321221242122123).

The spelling of 111121220001012 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, one thousand, twelve".