2021211221212 has 12 divisors (see below), whose sum is σ = 3537129653680. Its totient is φ = 1010602748736.

The previous prime is 2021211221129. The next prime is 2021211221213. The reversal of 2021211221212 is 2121221121202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021211221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021211221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2138788 + ... + 2935444.

Almost surely, 2^{2021211221212} is an apocalyptic number.

It is an amenable number.

2021211221212 is a deficient number, since it is larger than the sum of its proper divisors (1515918432468).

2021211221212 is a wasteful number, since it uses less digits than its factorization.

2021211221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430940 (or 1430938 counting only the distinct ones).

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

Adding to 2021211221212 its reverse (2121221121202), we get a palindrome (4142432342414).

The spelling of 2021211221212 in words is "two trillion, twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twelve".