111121212212 has 24 divisors (see below), whose sum is σ = 195428733696. Its totient is φ = 55285021088.

The previous prime is 111121212203. The next prime is 111121212221. The reversal of 111121212212 is 212212121111.

It is an interprime number because it is at equal distance from previous prime (111121212203) and next prime (111121212221).

It is a nude number because it is divisible by every one of its digits.

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, 685013 + ... + 831555.

It is an arithmetic number, because the mean of its divisors is an integer number (8142863904).

Almost surely, 2^111121212212 is an apocalyptic number.

It is an amenable number.

111121212212 is a deficient number, since it is larger than the sum of its proper divisors (84307521484).

111121212212 is a wasteful number, since it uses less digits than its factorization.

111121212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147487 (or 147485 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 111121212212 its reverse (212212121111), we get a palindrome (323333333323).

The spelling of 111121212212 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twelve".