212121020211212 has 24 divisors (see below), whose sum is σ = 424985021260800. Its totient is φ = 90749798482320.

The previous prime is 212121020211209. The next prime is 212121020211239. The reversal of 212121020211212 is 212112020121212.

It is a super-3 number, since 3×212121020211212³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6633741212 + ... + 6633773187.

It is an arithmetic number, because the mean of its divisors is an integer number (17707709219200).

Almost surely, 2^{212121020211212} is an apocalyptic number.

It is an amenable number.

212121020211212 is an abundant number, since it is smaller than the sum of its proper divisors (212864001049588).

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

212121020211212 is a wasteful number, since it uses less digits than its factorization.

212121020211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13267514981 (or 13267514979 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212121020211212 its reverse (212112020121212), we get a palindrome (424233040332424).

The spelling of 212121020211212 in words is "two hundred twelve trillion, one hundred twenty-one billion, twenty million, two hundred eleven thousand, two hundred twelve".