212112021200121 has 48 divisors (see below), whose sum is σ = 360393489191424. Its totient is φ = 117676296726912.

The previous prime is 212112021200071. The next prime is 212112021200129. The reversal of 212112021200121 is 121002120211212.

212112021200121 is a `hidden beast` number, since 212 + 1 + 120 + 212 + 0 + 0 + 121 = 666.

It is not a de Polignac number, because 212112021200121 - 2⁷ = 212112021199993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212112021200094 and 212112021200103.

It is not an unprimeable number, because it can be changed into a prime (212112021200129) 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, 97188726 + ... + 99347231.

It is an arithmetic number, because the mean of its divisors is an integer number (7508197691488).

Almost surely, 2^{212112021200121} is an apocalyptic number.

212112021200121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212112021200121 is a deficient number, since it is larger than the sum of its proper divisors (148281467991303).

212112021200121 is a wasteful number, since it uses less digits than its factorization.

212112021200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196536470 (or 196536467 counting only the distinct ones).

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

Adding to 212112021200121 its reverse (121002120211212), we get a palindrome (333114141411333).

The spelling of 212112021200121 in words is "two hundred twelve trillion, one hundred twelve billion, twenty-one million, two hundred thousand, one hundred twenty-one".