111221323122112 has 56 divisors (see below), whose sum is σ = 252910303216736. Its totient is φ = 47538489627648.

The previous prime is 111221323122101. The next prime is 111221323122157. The reversal of 111221323122112 is 211221323122111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

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, 332623623 + ... + 332957830.

Almost surely, 2^{111221323122112} is an apocalyptic number.

It is an amenable number.

111221323122112 is an abundant number, since it is smaller than the sum of its proper divisors (141688980094624).

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

111221323122112 is an equidigital number, since it uses as much as digits as its factorization.

111221323122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665581845 (or 665581835 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

Adding to 111221323122112 its reverse (211221323122111), we get a palindrome (322442646244223).

Subtracting 111221323122112 from its reverse (211221323122111), we obtain a palindrome (99999999999999).

The spelling of 111221323122112 in words is "one hundred eleven trillion, two hundred twenty-one billion, three hundred twenty-three million, one hundred twenty-two thousand, one hundred twelve".