111221101011012 has 48 divisors (see below), whose sum is σ = 261524678553600. Its totient is φ = 36786792350880.

The previous prime is 111221101010947. The next prime is 111221101011047. The reversal of 111221101011012 is 210110101122111.

It is a junction number, because it is equal to n+sod(n) for n = 111221101010982 and 111221101011000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11090289 + ... + 18585927.

It is an arithmetic number, because the mean of its divisors is an integer number (5448430803200).

Almost surely, 2^{111221101011012} is an apocalyptic number.

111221101011012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111221101011012 is an abundant number, since it is smaller than the sum of its proper divisors (150303577542588).

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

111221101011012 is a wasteful number, since it uses less digits than its factorization.

111221101011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7505216 (or 7505214 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111221101011012 its reverse (210110101122111), we get a palindrome (321331202133123).

The spelling of 111221101011012 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred one million, eleven thousand, twelve".