212121012200121 has 48 divisors (see below), whose sum is σ = 319221344083200. Its totient is φ = 135611574568704.

The previous prime is 212121012200101. The next prime is 212121012200159. The reversal of 212121012200121 is 121002210121212.

212121012200121 is a `hidden beast` number, since 2 + 121 + 210 + 12 + 200 + 121 = 666.

It is not a de Polignac number, because 212121012200121 - 2¹³ = 212121012191929 is a prime.

It is a super-3 number, since 3×212121012200121³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212121012200094 and 212121012200103.

It is not an unprimeable number, because it can be changed into a prime (212121012200101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7883190 + ... + 22054176.

It is an arithmetic number, because the mean of its divisors is an integer number (6650444668400).

Almost surely, 2^{212121012200121} is an apocalyptic number.

It is an amenable number.

212121012200121 is a deficient number, since it is larger than the sum of its proper divisors (107100331883079).

212121012200121 is a wasteful number, since it uses less digits than its factorization.

212121012200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14171678 (or 14171675 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212121012200121 its reverse (121002210121212), we get a palindrome (333123222321333).

The spelling of 212121012200121 in words is "two hundred twelve trillion, one hundred twenty-one billion, twelve million, two hundred thousand, one hundred twenty-one".