212121202121212 has 24 divisors (see below), whose sum is σ = 393048917807616. Its totient is φ = 99821536969728.

The previous prime is 212121202121197. The next prime is 212121202121341.

212121202121212 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33119428 + ... + 39001780.

It is an arithmetic number, because the mean of its divisors is an integer number (16377038241984).

Almost surely, 2^{212121202121212} is an apocalyptic number.

It is an amenable number.

212121202121212 is a deficient number, since it is larger than the sum of its proper divisors (180927715686404).

212121202121212 is a wasteful number, since it uses less digits than its factorization.

212121202121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6412677 (or 6412675 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

It can be divided in two parts, 21212120 and 2121212, that added together give a palindrome (23333332).

The spelling of 212121202121212 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty-one thousand, two hundred twelve".