212121000000012 has 24 divisors (see below), whose sum is σ = 495087215403312. Its totient is φ = 70687254942400.

The previous prime is 212121000000011. The next prime is 212121000000017. The reversal of 212121000000012 is 210000000121212.

It is a super-3 number, since 3×212121000000012³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (212121000000011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2468087439 + ... + 2468173382.

It is an arithmetic number, because the mean of its divisors is an integer number (20628633975138).

Almost surely, 2^{212121000000012} is an apocalyptic number.

It is an amenable number.

212121000000012 is an abundant number, since it is smaller than the sum of its proper divisors (282966215403300).

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

212121000000012 is a wasteful number, since it uses less digits than its factorization.

212121000000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4936264409 (or 4936264407 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212121000000012 its reverse (210000000121212), we get a palindrome (422121000121224).

The spelling of 212121000000012 in words is "two hundred twelve trillion, one hundred twenty-one billion, twelve", and thus it is an aban number.