111221022012 has 48 divisors (see below), whose sum is σ = 267529678080. Its totient is φ = 35946039168.

The previous prime is 111221021971. The next prime is 111221022043. The reversal of 111221022012 is 210220122111.

It is a junction number, because it is equal to n+sod(n) for n = 111221021982 and 111221022000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1024288 + ... + 1127655.

It is an arithmetic number, because the mean of its divisors is an integer number (5573534960).

Almost surely, 2^111221022012 is an apocalyptic number.

111221022012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111221022012 is an abundant number, since it is smaller than the sum of its proper divisors (156308656068).

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

111221022012 is a wasteful number, since it uses less digits than its factorization.

111221022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152082 (or 2152080 counting only the distinct ones).

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

Adding to 111221022012 its reverse (210220122111), we get a palindrome (321441144123).

The spelling of 111221022012 in words is "one hundred eleven billion, two hundred twenty-one million, twenty-two thousand, twelve".