1212100121212 has 12 divisors (see below), whose sum is σ = 2140999280280. Its totient is φ = 600386041136.

The previous prime is 1212100121201. The next prime is 1212100121213. The reversal of 1212100121212 is 2121210012121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212100121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1416004387 + ... + 1416005242.

It is an arithmetic number, because the mean of its divisors is an integer number (178416606690).

Almost surely, 2^{1212100121212} is an apocalyptic number.

It is an amenable number.

1212100121212 is a deficient number, since it is larger than the sum of its proper divisors (928899159068).

1212100121212 is a wasteful number, since it uses less digits than its factorization.

1212100121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832009740 (or 2832009738 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212100121212 its reverse (2121210012121), we get a palindrome (3333310133333).

It can be divided in two parts, 121210012121 and 2, that multiplied together give a palindrome (242420024242).

The spelling of 1212100121212 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred twenty-one thousand, two hundred twelve".