1212112221201 has 96 divisors (see below), whose sum is σ = 2071549928448. Its totient is φ = 668599747200.

The previous prime is 1212112221137. The next prime is 1212112221209. The reversal of 1212112221201 is 1021222112121.

It is not a de Polignac number, because 1212112221201 - 2⁶ = 1212112221137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1212112221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 160604710 + ... + 160612256.

It is an arithmetic number, because the mean of its divisors is an integer number (21578645088).

Almost surely, 2^{1212112221201} is an apocalyptic number.

It is an amenable number.

1212112221201 is a deficient number, since it is larger than the sum of its proper divisors (859437707247).

1212112221201 is a wasteful number, since it uses less digits than its factorization.

1212112221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8291 (or 8288 counting only the distinct ones).

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

Adding to 1212112221201 its reverse (1021222112121), we get a palindrome (2233334333322).

The spelling of 1212112221201 in words is "one trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, two hundred one".