212222222020121 has 16 divisors (see below), whose sum is σ = 213604562160000. Its totient is φ = 210842120722176.

The previous prime is 212222222020117. The next prime is 212222222020189. The reversal of 212222222020121 is 121020222222212.

It is a cyclic number.

It is not a de Polignac number, because 212222222020121 - 2² = 212222222020117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212222222020321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1508378945 + ... + 1508519633.

It is an arithmetic number, because the mean of its divisors is an integer number (13350285135000).

Almost surely, 2^{212222222020121} is an apocalyptic number.

It is an amenable number.

212222222020121 is a deficient number, since it is larger than the sum of its proper divisors (1382340139879).

212222222020121 is a wasteful number, since it uses less digits than its factorization.

212222222020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148576.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 212222222020121 its reverse (121020222222212), we get a palindrome (333242444242333).

The spelling of 212222222020121 in words is "two hundred twelve trillion, two hundred twenty-two billion, two hundred twenty-two million, twenty thousand, one hundred twenty-one".