212101200021121 has 8 divisors (see below), whose sum is σ = 224580346762464. Its totient is φ = 199622342786880.

The previous prime is 212101200021089. The next prime is 212101200021157. The reversal of 212101200021121 is 121120002101212.

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

It is a cyclic number.

It is not a de Polignac number, because 212101200021121 - 2⁵ = 212101200021089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212101200021095 and 212101200021104.

It is not an unprimeable number, because it can be changed into a prime (212101200321121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70867515 + ... + 73799776.

It is an arithmetic number, because the mean of its divisors is an integer number (28072543345308).

Almost surely, 2^{212101200021121} is an apocalyptic number.

It is an amenable number.

212101200021121 is a deficient number, since it is larger than the sum of its proper divisors (12479146741343).

212101200021121 is a wasteful number, since it uses less digits than its factorization.

212101200021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144753551.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212101200021121 its reverse (121120002101212), we get a palindrome (333221202122333).

The spelling of 212101200021121 in words is "two hundred twelve trillion, one hundred one billion, two hundred million, twenty-one thousand, one hundred twenty-one".