111221112012 has 24 divisors (see below), whose sum is σ = 259521540096. Its totient is φ = 37072902288.

The previous prime is 111221111993. The next prime is 111221112043. The reversal of 111221112012 is 210211122111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111221111982 and 111221112000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804573 + ... + 932619.

It is an arithmetic number, because the mean of its divisors is an integer number (10813397504).

Almost surely, 2^111221112012 is an apocalyptic number.

111221112012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111221112012 is an abundant number, since it is smaller than the sum of its proper divisors (148300428084).

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

111221112012 is a wasteful number, since it uses less digits than its factorization.

111221112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200437 (or 200435 counting only the distinct ones).

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

Adding to 111221112012 its reverse (210211122111), we get a palindrome (321432234123).

The spelling of 111221112012 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand, twelve".