212220121211121 has 8 divisors (see below), whose sum is σ = 282960384271264. Its totient is φ = 141479969479200.

The previous prime is 212220121211113. The next prime is 212220121211129. The reversal of 212220121211121 is 121112121022212.

It is an interprime number because it is at equal distance from previous prime (212220121211113) and next prime (212220121211129).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212220121211121 - 2³ = 212220121211113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212220121211129) 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 7 ways as a sum of consecutive naturals, for example, 23277655 + ... + 31085196.

It is an arithmetic number, because the mean of its divisors is an integer number (35370048033908).

Almost surely, 2^{212220121211121} is an apocalyptic number.

It is an amenable number.

212220121211121 is a deficient number, since it is larger than the sum of its proper divisors (70740263060143).

212220121211121 is a wasteful number, since it uses less digits than its factorization.

212220121211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55664111.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212220121211121 its reverse (121112121022212), we get a palindrome (333332242233333).

The spelling of 212220121211121 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twenty-one".