1212021222112 has 24 divisors (see below), whose sum is σ = 2389820982696. Its totient is φ = 605082559872.

The previous prime is 1212021222101. The next prime is 1212021222121. The reversal of 1212021222112 is 2112221202121.

It is a super-4 number, since 4×1212021222112⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a self number, because there is not a number n which added to its sum of digits gives 1212021222112.

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, 28980378 + ... + 29022169.

It is an arithmetic number, because the mean of its divisors is an integer number (99575874279).

Almost surely, 2^{1212021222112} is an apocalyptic number.

It is an amenable number.

1212021222112 is a deficient number, since it is larger than the sum of its proper divisors (1177799760584).

1212021222112 is an equidigital number, since it uses as much as digits as its factorization.

1212021222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58003210 (or 58003202 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212021222112 its reverse (2112221202121), we get a palindrome (3324242424233).

The spelling of 1212021222112 in words is "one trillion, two hundred twelve billion, twenty-one million, two hundred twenty-two thousand, one hundred twelve".