111212222120212 has 12 divisors (see below), whose sum is σ = 206069705693460. Its totient is φ = 52335163350656.

The previous prime is 111212222120179. The next prime is 111212222120243. The reversal of 111212222120212 is 212021222212111.

It can be written as a sum of positive squares in 2 ways, for example, as 94782608324496 + 16429613795716 = 9735636^2 + 4053346^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817736927287 + ... + 817736927422.

It is an arithmetic number, because the mean of its divisors is an integer number (17172475474455).

Almost surely, 2^{111212222120212} is an apocalyptic number.

It is an amenable number.

111212222120212 is a deficient number, since it is larger than the sum of its proper divisors (94857483573248).

111212222120212 is a wasteful number, since it uses less digits than its factorization.

111212222120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635473854730 (or 1635473854728 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 111212222120212 its reverse (212021222212111), we get a palindrome (323233444332323).

The spelling of 111212222120212 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twelve".