111111121222010 has 96 divisors (see below), whose sum is σ = 250576481619072. Its totient is φ = 35161047734400.

The previous prime is 111111121222001. The next prime is 111111121222019. The reversal of 111111121222010 is 10222121111111.

It is an interprime number because it is at equal distance from previous prime (111111121222001) and next prime (111111121222019).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111111121222010.

It is not an unprimeable number, because it can be changed into a prime (111111121222019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58452035 + ... + 60322985.

It is an arithmetic number, because the mean of its divisors is an integer number (2610171683532).

Almost surely, 2^{111111121222010} is an apocalyptic number.

111111121222010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111111121222010 is an abundant number, since it is smaller than the sum of its proper divisors (139465360397062).

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

111111121222010 is a wasteful number, since it uses less digits than its factorization.

111111121222010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880308 (or 1880301 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111111121222010 its reverse (10222121111111), we get a palindrome (121333242333121).

It can be divided in two parts, 111111 and 121222010, that added together give a palindrome (121333121).

The spelling of 111111121222010 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, ten".