111221020012 has 24 divisors (see below), whose sum is σ = 195092578800. Its totient is φ = 55480431936.

The previous prime is 111221020003. The next prime is 111221020019. The reversal of 111221020012 is 210020122111.

It is a junction number, because it is equal to n+sod(n) for n = 111221019974 and 111221020001.

It is not an unprimeable number, because it can be changed into a prime (111221020019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3127443 + ... + 3162805.

It is an arithmetic number, because the mean of its divisors is an integer number (8128857450).

Almost surely, 2^111221020012 is an apocalyptic number.

It is an amenable number.

111221020012 is a deficient number, since it is larger than the sum of its proper divisors (83871558788).

111221020012 is a wasteful number, since it uses less digits than its factorization.

111221020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37185 (or 37183 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111221020012 its reverse (210020122111), we get a palindrome (321241142123).

The spelling of 111221020012 in words is "one hundred eleven billion, two hundred twenty-one million, twenty thousand, twelve".