2121012020212 has 24 divisors (see below), whose sum is σ = 3777136003872. Its totient is φ = 1041990612000.

The previous prime is 2121012020209. The next prime is 2121012020219. The reversal of 2121012020212 is 2120202101212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121012020219) 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 7 ways as a sum of consecutive naturals, for example, 19985358 + ... + 20091205.

It is an arithmetic number, because the mean of its divisors is an integer number (157380666828).

Almost surely, 2^{2121012020212} is an apocalyptic number.

It is an amenable number.

2121012020212 is a deficient number, since it is larger than the sum of its proper divisors (1656123983660).

2121012020212 is a wasteful number, since it uses less digits than its factorization.

2121012020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40076799 (or 40076797 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121012020212 its reverse (2120202101212), we get a palindrome (4241214121424).

The spelling of 2121012020212 in words is "two trillion, one hundred twenty-one billion, twelve million, twenty thousand, two hundred twelve".