111212445522 has 16 divisors (see below), whose sum is σ = 224627118912. Its totient is φ = 36703777200.

The previous prime is 111212445517. The next prime is 111212445541. The reversal of 111212445522 is 225544212111.

It is a self number, because there is not a number n which added to its sum of digits gives 111212445522.

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, 91758838 + ... + 91760049.

It is an arithmetic number, because the mean of its divisors is an integer number (14039194932).

Almost surely, 2^111212445522 is an apocalyptic number.

111212445522 is an abundant number, since it is smaller than the sum of its proper divisors (113414673390).

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

111212445522 is a wasteful number, since it uses less digits than its factorization.

111212445522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183518993.

The product of its digits is 6400, while the sum is 30.

Adding to 111212445522 its reverse (225544212111), we get a palindrome (336756657633).

The spelling of 111212445522 in words is "one hundred eleven billion, two hundred twelve million, four hundred forty-five thousand, five hundred twenty-two".