111100021222212 has 108 divisors (see below), whose sum is σ = 317030596099308. Its totient is φ = 32756762966400.

The previous prime is 111100021222207. The next prime is 111100021222213. The reversal of 111100021222212 is 212222120001111.

111100021222212 is a `hidden beast` number, since 111 + 100 + 0 + 21 + 222 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 102772271927556 + 8327749294656 = 10137666^2 + 2885784^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (111100021222213) 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 35 ways as a sum of consecutive naturals, for example, 344501739 + ... + 344824082.

It is an arithmetic number, because the mean of its divisors is an integer number (2935468482401).

Almost surely, 2^{111100021222212} is an apocalyptic number.

111100021222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111100021222212 is an abundant number, since it is smaller than the sum of its proper divisors (205930574877096).

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

111100021222212 is a wasteful number, since it uses less digits than its factorization.

111100021222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689325890 (or 689325874 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111100021222212 its reverse (212222120001111), we get a palindrome (323322141223323).

The spelling of 111100021222212 in words is "one hundred eleven trillion, one hundred billion, twenty-one million, two hundred twenty-two thousand, two hundred twelve".