111220221012 has 12 divisors (see below), whose sum is σ = 259513849056. Its totient is φ = 37073407000.

The previous prime is 111220221011. The next prime is 111220221019. The reversal of 111220221012 is 210122022111.

111220221012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 111220220982 and 111220221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220221011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4634175864 + ... + 4634175887.

It is an arithmetic number, because the mean of its divisors is an integer number (21626154088).

Almost surely, 2^111220221012 is an apocalyptic number.

111220221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111220221012 is an abundant number, since it is smaller than the sum of its proper divisors (148293628044).

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

111220221012 is a wasteful number, since it uses less digits than its factorization.

111220221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9268351758 (or 9268351756 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111220221012 its reverse (210122022111), we get a palindrome (321342243123).

The spelling of 111220221012 in words is "one hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, twelve".