111121103212 has 24 divisors (see below), whose sum is σ = 222493945856. Its totient is φ = 47569385808.

The previous prime is 111121103173. The next prime is 111121103221. The reversal of 111121103212 is 212301121111.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2222508 + ... + 2271955.

Almost surely, 2^111121103212 is an apocalyptic number.

It is an amenable number.

111121103212 is an abundant number, since it is smaller than the sum of its proper divisors (111372842644).

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

111121103212 is a wasteful number, since it uses less digits than its factorization.

111121103212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495357 (or 4495355 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111121103212 its reverse (212301121111), we get a palindrome (323422224323).

The spelling of 111121103212 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred three thousand, two hundred twelve".