111111122201212 has 24 divisors (see below), whose sum is σ = 222236375266304. Its totient is φ = 47616024329712.

The previous prime is 111111122201137. The next prime is 111111122201213. The reversal of 111111122201212 is 212102221111111.

It is a self number, because there is not a number n which added to its sum of digits gives 111111122201212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111122201213) 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, 125720208 + ... + 126600919.

Almost surely, 2^{111111122201212} is an apocalyptic number.

It is an amenable number.

111111122201212 is an abundant number, since it is smaller than the sum of its proper divisors (111125253065092).

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

111111122201212 is a wasteful number, since it uses less digits than its factorization.

111111122201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252336865 (or 252336863 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111111122201212 its reverse (212102221111111), we get a palindrome (323213343312323).

The spelling of 111111122201212 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-two million, two hundred one thousand, two hundred twelve".