212121201222122 has 16 divisors (see below), whose sum is σ = 331458994521600. Its totient is φ = 101697646039920.

The previous prime is 212121201221911. The next prime is 212121201222143. The reversal of 212121201222122 is 221222102121212.

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, 15694074422 + ... + 15694087937.

It is an arithmetic number, because the mean of its divisors is an integer number (20716187157600).

Almost surely, 2^{212121201222122} is an apocalyptic number.

212121201222122 is a deficient number, since it is larger than the sum of its proper divisors (119337793299478).

212121201222122 is a wasteful number, since it uses less digits than its factorization.

212121201222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31388162501.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 212121201222122 its reverse (221222102121212), we get a palindrome (433343303343334).

The spelling of 212121201222122 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-two".